Message ID | 1508367333-3237-3-git-send-email-allison.henderson@oracle.com (mailing list archive) |
---|---|
State | Superseded |
Headers | show |
On Wed, Oct 18, 2017 at 03:55:18PM -0700, Allison Henderson wrote: > This patch adds two new log item types for setting or > removing attributes as deferred operations. The > xfs_attri_log_item logs an intent to set or remove an > attribute. The corresponding xfs_attrd_log_item holds > a reference to the xfs_attri_log_item and is freed once > the transaction is done. Both log items use a generic > xfs_attr_log_format structure that contains the attribute > name, value, flags, inode, and an op_flag that indicates > if the operations is a set or remove. > > At the moment, this feature will only be used by the parent > pointer patch set which uses attributes to store information > about an inodes parent. > > Signed-off-by: Allison Henderson <allison.henderson@oracle.com> > --- > fs/xfs/Makefile | 2 + > fs/xfs/libxfs/xfs_attr.c | 2 +- > fs/xfs/libxfs/xfs_defer.h | 1 + > fs/xfs/libxfs/xfs_log_format.h | 36 ++- > fs/xfs/libxfs/xfs_types.h | 1 + > fs/xfs/xfs_attr.h | 20 +- > fs/xfs/xfs_attr_item.c | 512 +++++++++++++++++++++++++++++++++++++++++ > fs/xfs/xfs_attr_item.h | 111 +++++++++ > fs/xfs/xfs_log_recover.c | 140 +++++++++++ > fs/xfs/xfs_super.c | 1 + > fs/xfs/xfs_trans.h | 13 ++ > fs/xfs/xfs_trans_attr.c | 286 +++++++++++++++++++++++ > 12 files changed, 1121 insertions(+), 4 deletions(-) > > diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile > index a6e955b..ec6486b 100644 > --- a/fs/xfs/Makefile > +++ b/fs/xfs/Makefile > @@ -106,6 +106,7 @@ xfs-y += xfs_log.o \ > xfs_bmap_item.o \ > xfs_buf_item.o \ > xfs_extfree_item.o \ > + xfs_attr_item.o \ > xfs_icreate_item.o \ > xfs_inode_item.o \ > xfs_refcount_item.o \ > @@ -115,6 +116,7 @@ xfs-y += xfs_log.o \ > xfs_trans_bmap.o \ > xfs_trans_buf.o \ > xfs_trans_extfree.o \ > + xfs_trans_attr.o \ > xfs_trans_inode.o \ > xfs_trans_refcount.o \ > xfs_trans_rmap.o \ > diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c > index b00ec1f..5325ec2 100644 > --- a/fs/xfs/libxfs/xfs_attr.c > +++ b/fs/xfs/libxfs/xfs_attr.c > @@ -74,7 +74,7 @@ STATIC int xfs_attr_fillstate(xfs_da_state_t *state); > STATIC int xfs_attr_refillstate(xfs_da_state_t *state); > > > -STATIC int > +int > xfs_attr_args_init( > struct xfs_da_args *args, > struct xfs_inode *dp, > diff --git a/fs/xfs/libxfs/xfs_defer.h b/fs/xfs/libxfs/xfs_defer.h > index d4f046d..ef0f8bf 100644 > --- a/fs/xfs/libxfs/xfs_defer.h > +++ b/fs/xfs/libxfs/xfs_defer.h > @@ -55,6 +55,7 @@ enum xfs_defer_ops_type { > XFS_DEFER_OPS_TYPE_REFCOUNT, > XFS_DEFER_OPS_TYPE_RMAP, > XFS_DEFER_OPS_TYPE_FREE, > + XFS_DEFER_OPS_TYPE_ATTR, > XFS_DEFER_OPS_TYPE_MAX, > }; > > diff --git a/fs/xfs/libxfs/xfs_log_format.h b/fs/xfs/libxfs/xfs_log_format.h > index 8372e9b..b0ce87e 100644 > --- a/fs/xfs/libxfs/xfs_log_format.h > +++ b/fs/xfs/libxfs/xfs_log_format.h > @@ -18,6 +18,8 @@ > #ifndef __XFS_LOG_FORMAT_H__ > #define __XFS_LOG_FORMAT_H__ > > +#include "xfs_attr.h" > + > struct xfs_mount; > struct xfs_trans_res; > > @@ -116,7 +118,12 @@ static inline uint xlog_get_cycle(char *ptr) > #define XLOG_REG_TYPE_CUD_FORMAT 24 > #define XLOG_REG_TYPE_BUI_FORMAT 25 > #define XLOG_REG_TYPE_BUD_FORMAT 26 > -#define XLOG_REG_TYPE_MAX 26 > +#define XLOG_REG_TYPE_ATTRI_FORMAT 27 > +#define XLOG_REG_TYPE_ATTRD_FORMAT 28 > +#define XLOG_REG_TYPE_ATTR_NAME 29 > +#define XLOG_REG_TYPE_ATTR_VALUE 30 > +#define XLOG_REG_TYPE_MAX 31 > + > > /* > * Flags to log operation header > @@ -239,6 +246,8 @@ typedef struct xfs_trans_header { > #define XFS_LI_CUD 0x1243 > #define XFS_LI_BUI 0x1244 /* bmbt update intent */ > #define XFS_LI_BUD 0x1245 > +#define XFS_LI_ATTRI 0x1246 /* attr set/remove intent*/ > +#define XFS_LI_ATTRD 0x1247 /* attr set/remove done */ > > #define XFS_LI_TYPE_DESC \ > { XFS_LI_EFI, "XFS_LI_EFI" }, \ > @@ -254,7 +263,9 @@ typedef struct xfs_trans_header { > { XFS_LI_CUI, "XFS_LI_CUI" }, \ > { XFS_LI_CUD, "XFS_LI_CUD" }, \ > { XFS_LI_BUI, "XFS_LI_BUI" }, \ > - { XFS_LI_BUD, "XFS_LI_BUD" } > + { XFS_LI_BUD, "XFS_LI_BUD" }, \ > + { XFS_LI_ATTRI, "XFS_LI_ATTRI" }, \ > + { XFS_LI_ATTRD, "XFS_LI_ATTRD" } > > /* > * Inode Log Item Format definitions. > @@ -863,4 +874,25 @@ struct xfs_icreate_log { > __be32 icl_gen; /* inode generation number to use */ > }; > > +/* Flags for deferred attribute operations */ > +#define ATTR_OP_FLAGS_SET 0x01 /* Set the attribute */ The names need to have "XFS_" prefixed here because this is a public header file, e.g. XFS_ATTR_OP_FLAGS_SET. > +#define ATTR_OP_FLAGS_REMOVE 0x02 /* Remove the attribute */ > +#define ATTR_OP_FLAGS_MAX 0x02 /* Max flags */ I would be a little more explicit about which bits of op_flags are actual bit flags and which parts are mutually exclusive type codes. IOWs, from just these definitions here it's not clear that _SET and _REMOVE can't both be set at the same time. /* upper bits are flags, lower byte is type code */ #define XFS_ATTR_OP_FLAGS_SET 1 #define XFS_ATTR_OP_FLAGS_REMOVE 2 #define XFS_ATTR_OP_FLAGS_TYPE_MASK 0xFF (TBH this opcode part could be an enum defined elsewhere like what RUI pe_flags does...) #define XFS_ATTR_OP_FLAGS_AFLAG (1U << 31) #define XFS_ATTR_OP_FLAGS_SOMEOTHERFLAG (1U << 30) > + > +/* > + * This is the structure used to lay out an attr log item in the > + * log. > + */ > +struct xfs_attr_log_format { > + uint64_t id; /* attri identifier */ > + xfs_ino_t ino; /* the inode for this attr operation */ > + uint32_t op_flags; /* marks the op as a set or remove */ > + uint32_t name_len; /* attr name length */ > + uint32_t value_len; /* attr value length */ > + uint32_t attr_flags; /* attr flags */ > + uint16_t type; /* attri log item type */ > + uint16_t size; /* size of this item */ > + uint32_t pad; /* pad to 64 bit aligned */ The names ought to have structure prefixes because this is a public header. uint64_t alf_id; uint64_t alf_ino; ... uint32_t alf_pad; > +}; > + > #endif /* __XFS_LOG_FORMAT_H__ */ > diff --git a/fs/xfs/libxfs/xfs_types.h b/fs/xfs/libxfs/xfs_types.h > index 0220159..5372063 100644 > --- a/fs/xfs/libxfs/xfs_types.h > +++ b/fs/xfs/libxfs/xfs_types.h > @@ -23,6 +23,7 @@ typedef uint32_t prid_t; /* project ID */ > typedef uint32_t xfs_agblock_t; /* blockno in alloc. group */ > typedef uint32_t xfs_agino_t; /* inode # within allocation grp */ > typedef uint32_t xfs_extlen_t; /* extent length in blocks */ > +typedef uint32_t xfs_attrlen_t; /* attr length */ > typedef uint32_t xfs_agnumber_t; /* allocation group number */ > typedef int32_t xfs_extnum_t; /* # of extents in a file */ > typedef int16_t xfs_aextnum_t; /* # extents in an attribute fork */ > diff --git a/fs/xfs/xfs_attr.h b/fs/xfs/xfs_attr.h > index 8542606..34bb4cb 100644 > --- a/fs/xfs/xfs_attr.h > +++ b/fs/xfs/xfs_attr.h > @@ -18,6 +18,8 @@ > #ifndef __XFS_ATTR_H__ > #define __XFS_ATTR_H__ > > +#include "libxfs/xfs_defer.h" What does this header file need from xfs_defer.h? > struct xfs_inode; > struct xfs_da_args; > struct xfs_attr_list_context; > @@ -87,6 +89,20 @@ typedef struct attrlist_ent { /* data from attr_list() */ > } attrlist_ent_t; > > /* > + * List of attrs to commit later. > + */ > +struct xfs_attr_item { > + xfs_ino_t xattri_ino; > + uint32_t xattri_op_flags; > + uint32_t xattri_value_len; /* length of name and val */ > + uint32_t xattri_name_len; /* length of name */ > + uint32_t xattri_flags; /* attr flags */ > + char xattri_name[XATTR_NAME_MAX]; > + char xattri_value[XATTR_SIZE_MAX]; MAXNAMELEN and XFS_XATTR_SIZE_MAX ? (Ugh, really, we should just clean that up to XFS_MAXNAMELEN...) > + struct list_head xattri_list; > +}; > + > +/* > * Given a pointer to the (char*) buffer containing the attr_list() result, > * and an index, return a pointer to the indicated attribute in the buffer. > */ > @@ -154,6 +170,8 @@ int xfs_attr_remove(struct xfs_inode *dp, const unsigned char *name, int flags); > int xfs_attr_remove_args(struct xfs_da_args *args, int flags); > int xfs_attr_list(struct xfs_inode *dp, char *buffer, int bufsize, > int flags, struct attrlist_cursor_kern *cursor); > - > +int xfs_attr_args_init(struct xfs_da_args *args, struct xfs_inode *dp, > + const unsigned char *name, int flags); > +int xfs_attr_calc_size(struct xfs_da_args *args, int *local); > > #endif /* __XFS_ATTR_H__ */ > diff --git a/fs/xfs/xfs_attr_item.c b/fs/xfs/xfs_attr_item.c > new file mode 100644 > index 0000000..8cbe9b0 > --- /dev/null > +++ b/fs/xfs/xfs_attr_item.c > @@ -0,0 +1,512 @@ > +/* > + * Copyright (c) 2017 Oracle, Inc. > + * All Rights Reserved. > + * > + * This program is free software; you can redistribute it and/or > + * modify it under the terms of the GNU General Public License as > + * published by the Free Software Foundation. > + * > + * This program is distributed in the hope that it would be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program; if not, write the Free Software Foundation Inc. > + */ > +#include "xfs.h" > +#include "xfs_fs.h" > +#include "xfs_format.h" > +#include "xfs_log_format.h" > +#include "xfs_trans_resv.h" > +#include "xfs_bit.h" > +#include "xfs_mount.h" > +#include "xfs_trans.h" > +#include "xfs_trans_priv.h" > +#include "xfs_buf_item.h" > +#include "xfs_attr_item.h" > +#include "xfs_log.h" > +#include "xfs_btree.h" > +#include "xfs_rmap.h" > + > + > +static inline struct xfs_attri_log_item *ATTRI_ITEM(struct xfs_log_item *lip) > +{ > + return container_of(lip, struct xfs_attri_log_item, item); > +} > + > +void > +xfs_attri_item_free( > + struct xfs_attri_log_item *attrip) > +{ > + kmem_free(attrip->item.li_lv_shadow); > + kmem_free(attrip); > +} > + > +/* > + * This returns the number of iovecs needed to log the given attri item. > + * We only need 1 iovec for an attri item. It just logs the attr_log_format > + * structure. > + */ > +static inline int > +xfs_attri_item_sizeof( > + struct xfs_attri_log_item *attrip) > +{ > + return sizeof(struct xfs_attr_log_format); > +} > + > +STATIC void > +xfs_attri_item_size( > + struct xfs_log_item *lip, > + int *nvecs, > + int *nbytes) > +{ > + struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip); > + > + *nvecs += 1; > + *nbytes += xfs_attri_item_sizeof(attrip); > + > + if (attrip->name_len > 0) { > + *nvecs += 1; > + nbytes += attrip->name_len; > + } > + > + if (attrip->value_len > 0) { > + *nvecs += 1; > + nbytes += attrip->value_len; > + } > +} > + > +/* > + * This is called to fill in the vector of log iovecs for the > + * given attri log item. We use only 1 iovec, and we point that > + * at the attri_log_format structure embedded in the attri item. > + * It is at this point that we assert that all of the attr > + * slots in the attri item have been filled. > + */ > +STATIC void > +xfs_attri_item_format( > + struct xfs_log_item *lip, > + struct xfs_log_vec *lv) > +{ > + struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip); > + struct xfs_log_iovec *vecp = NULL; > + > + attrip->format.type = XFS_LI_ATTRI; > + attrip->format.size = 1; > + > + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTRI_FORMAT, > + &attrip->format, > + xfs_attri_item_sizeof(attrip)); > + if (attrip->name_len > 0) > + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTR_NAME, > + attrip->name, attrip->name_len); > + > + if (attrip->value_len > 0) > + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTR_VALUE, > + attrip->value, attrip->value_len); > +} > + > + > +/* > + * Pinning has no meaning for an attri item, so just return. > + */ > +STATIC void > +xfs_attri_item_pin( > + struct xfs_log_item *lip) > +{ > +} > + > +/* > + * The unpin operation is the last place an ATTRI is manipulated in the log. It > + * is either inserted in the AIL or aborted in the event of a log I/O error. In > + * either case, the EFI transaction has been successfully committed to make it EFI? > + * this far. Therefore, we expect whoever committed the ATTRI to either > + * construct and commit the ATTRD or drop the ATTRD's reference in the event of > + * error. Simply drop the log's ATTRI reference now that the log is done with > + * it. > + */ > +STATIC void > +xfs_attri_item_unpin( > + struct xfs_log_item *lip, > + int remove) > +{ > + struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip); > + > + xfs_attri_release(attrip); > +} > + > +/* > + * attri items have no locking or pushing. However, since ATTRIs are pulled > + * from the AIL when their corresponding ATTRDs are committed to disk, their > + * situation is very similar to being pinned. Return XFS_ITEM_PINNED so that > + * the caller will eventually flush the log. This should help in getting the > + * ATTRI out of the AIL. > + */ > +STATIC uint > +xfs_attri_item_push( > + struct xfs_log_item *lip, > + struct list_head *buffer_list) > +{ > + return XFS_ITEM_PINNED; > +} > + > +/* > + * The ATTRI has been either committed or aborted if the transaction has been > + * cancelled. If the transaction was cancelled, an ATTRD isn't going to be > + * constructed and thus we free the ATTRI here directly. > + */ > +STATIC void > +xfs_attri_item_unlock( > + struct xfs_log_item *lip) > +{ > + if (lip->li_flags & XFS_LI_ABORTED) > + xfs_attri_item_free(ATTRI_ITEM(lip)); > +} > + > +/* > + * The ATTRI is logged only once and cannot be moved in the log, so simply > + * return the lsn at which it's been logged. > + */ > +STATIC xfs_lsn_t > +xfs_attri_item_committed( > + struct xfs_log_item *lip, > + xfs_lsn_t lsn) > +{ > + return lsn; > +} > + > +STATIC void > +xfs_attri_item_committing( > + struct xfs_log_item *lip, > + xfs_lsn_t lsn) > +{ > +} > + > +/* > + * This is the ops vector shared by all attri log items. > + */ > +static const struct xfs_item_ops xfs_attri_item_ops = { > + .iop_size = xfs_attri_item_size, > + .iop_format = xfs_attri_item_format, > + .iop_pin = xfs_attri_item_pin, > + .iop_unpin = xfs_attri_item_unpin, > + .iop_unlock = xfs_attri_item_unlock, > + .iop_committed = xfs_attri_item_committed, > + .iop_push = xfs_attri_item_push, > + .iop_committing = xfs_attri_item_committing > +}; > + > + > +/* > + * Allocate and initialize an attri item > + */ > +struct xfs_attri_log_item * > +xfs_attri_init( > + struct xfs_mount *mp) > + > +{ > + struct xfs_attri_log_item *attrip; > + uint size; > + > + size = (uint)(sizeof(struct xfs_attri_log_item)); > + attrip = kmem_zalloc(size, KM_SLEEP); > + > + xfs_log_item_init(mp, &(attrip->item), XFS_LI_ATTRI, > + &xfs_attri_item_ops); > + attrip->format.id = (uintptr_t)(void *)attrip; > + atomic_set(&attrip->refcount, 2); > + > + return attrip; > +} > + > +/* > + * Copy an attr format buffer from the given buf, and into the destination > + * attr format structure. > + */ > +int > +xfs_attr_copy_format(struct xfs_log_iovec *buf, > + struct xfs_attr_log_format *dst_attr_fmt) > +{ > + struct xfs_attr_log_format *src_attr_fmt = buf->i_addr; > + uint len = sizeof(struct xfs_attr_log_format); > + > + if (buf->i_len == len) { > + memcpy((char *)dst_attr_fmt, (char *)src_attr_fmt, len); > + return 0; > + } > + return -EFSCORRUPTED; > +} > + > +/* > + * Freeing the attri requires that we remove it from the AIL if it has already > + * been placed there. However, the ATTRI may not yet have been placed in the > + * AIL when called by xfs_attri_release() from ATTRD processing due to the > + * ordering of committed vs unpin operations in bulk insert operations. Hence > + * the reference count to ensure only the last caller frees the ATTRI. > + */ > +void > +xfs_attri_release( > + struct xfs_attri_log_item *attrip) > +{ > + ASSERT(atomic_read(&attrip->refcount) > 0); > + if (atomic_dec_and_test(&attrip->refcount)) { > + xfs_trans_ail_remove(&attrip->item, > + SHUTDOWN_LOG_IO_ERROR); > + xfs_attri_item_free(attrip); > + } > +} > + > +static inline struct xfs_attrd_log_item *ATTRD_ITEM(struct xfs_log_item *lip) > +{ > + return container_of(lip, struct xfs_attrd_log_item, item); > +} > + > +STATIC void > +xfs_attrd_item_free(struct xfs_attrd_log_item *attrdp) > +{ > + kmem_free(attrdp->item.li_lv_shadow); > + kmem_free(attrdp); > +} > + > +/* > + * This returns the number of iovecs needed to log the given attrd item. > + * We only need 1 iovec for an attrd item. It just logs the attr_log_format > + * structure. > + */ > +static inline int > +xfs_attrd_item_sizeof( > + struct xfs_attrd_log_item *attrdp) > +{ > + return sizeof(struct xfs_attr_log_format); > +} > + > +STATIC void > +xfs_attrd_item_size( > + struct xfs_log_item *lip, > + int *nvecs, > + int *nbytes) > +{ > + struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip); > + *nvecs += 1; > + *nbytes += xfs_attrd_item_sizeof(attrdp); > + > + if (attrdp->name_len > 0) { > + *nvecs += 1; > + nbytes += attrdp->name_len; > + } > + > + if (attrdp->value_len > 0) { > + *nvecs += 1; > + nbytes += attrdp->value_len; > + } > +} > + > +/* > + * This is called to fill in the vector of log iovecs for the > + * given attrd log item. We use only 1 iovec, and we point that > + * at the attr_log_format structure embedded in the attrd item. > + * It is at this point that we assert that all of the attr > + * slots in the attrd item have been filled. > + */ > +STATIC void > +xfs_attrd_item_format( > + struct xfs_log_item *lip, > + struct xfs_log_vec *lv) > +{ > + struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip); > + struct xfs_log_iovec *vecp = NULL; > + > + attrdp->format.type = XFS_LI_ATTRD; > + attrdp->format.size = 1; > + > + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTRD_FORMAT, > + &attrdp->format, > + xfs_attrd_item_sizeof(attrdp)); > + > + if (attrdp->name_len > 0) > + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTR_NAME, > + attrdp->name, attrdp->name_len); > + > + if (attrdp->value_len > 0) > + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTR_VALUE, > + attrdp->value, attrdp->value_len); No need to log name/value for ATTRD items, since we only care about matching alf_id between ATTRI and ATTRD items. > +} > + > +/* > + * Pinning has no meaning for an attrd item, so just return. > + */ > +STATIC void > +xfs_attrd_item_pin( > + struct xfs_log_item *lip) > +{ > +} > + > +/* > + * Since pinning has no meaning for an attrd item, unpinning does > + * not either. > + */ > +STATIC void > +xfs_attrd_item_unpin( > + struct xfs_log_item *lip, > + int remove) > +{ > +} > + > +/* > + * There isn't much you can do to push on an attrd item. It is simply stuck > + * waiting for the log to be flushed to disk. > + */ > +STATIC uint > +xfs_attrd_item_push( > + struct xfs_log_item *lip, > + struct list_head *buffer_list) > +{ > + return XFS_ITEM_PINNED; > +} > + > +/* > + * The ATTRD is either committed or aborted if the transaction is cancelled. If > + * the transaction is cancelled, drop our reference to the ATTRI and free the > + * ATTRD. > + */ > +STATIC void > +xfs_attrd_item_unlock( > + struct xfs_log_item *lip) > +{ > + struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip); > + > + if (lip->li_flags & XFS_LI_ABORTED) { > + xfs_attri_release(attrdp->attrip); > + xfs_attrd_item_free(attrdp); > + } > +} > + > +/* > + * When the attrd item is committed to disk, all we need to do is delete our > + * reference to our partner attri item and then free ourselves. Since we're > + * freeing ourselves we must return -1 to keep the transaction code from > + * further referencing this item. > + */ > +STATIC xfs_lsn_t > +xfs_attrd_item_committed( > + struct xfs_log_item *lip, > + xfs_lsn_t lsn) > +{ > + struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip); > + > + /* > + * Drop the ATTRI reference regardless of whether the ATTRD has been > + * aborted. Once the ATTRD transaction is constructed, it is the sole > + * responsibility of the ATTRD to release the ATTRI (even if the ATTRI > + * is aborted due to log I/O error). > + */ > + xfs_attri_release(attrdp->attrip); > + xfs_attrd_item_free(attrdp); > + > + return (xfs_lsn_t)-1; > +} > + > +STATIC void > +xfs_attrd_item_committing( > + struct xfs_log_item *lip, > + xfs_lsn_t lsn) > +{ > +} > + > +/* > + * This is the ops vector shared by all attrd log items. > + */ > +static const struct xfs_item_ops xfs_attrd_item_ops = { > + .iop_size = xfs_attrd_item_size, > + .iop_format = xfs_attrd_item_format, > + .iop_pin = xfs_attrd_item_pin, > + .iop_unpin = xfs_attrd_item_unpin, > + .iop_unlock = xfs_attrd_item_unlock, > + .iop_committed = xfs_attrd_item_committed, > + .iop_push = xfs_attrd_item_push, > + .iop_committing = xfs_attrd_item_committing > +}; > + > +/* > + * Allocate and initialize an attrd item > + */ > +struct xfs_attrd_log_item * > +xfs_attrd_init( > + struct xfs_mount *mp, > + struct xfs_attri_log_item *attrip) > + > +{ > + struct xfs_attrd_log_item *attrdp; > + uint size; > + > + size = (uint)(sizeof(struct xfs_attrd_log_item)); > + attrdp = kmem_zalloc(size, KM_SLEEP); > + > + xfs_log_item_init(mp, &attrdp->item, XFS_LI_ATTRD, > + &xfs_attrd_item_ops); > + attrdp->attrip = attrip; > + attrdp->format.id = attrip->format.id; > + > + return attrdp; > +} > + > +/* > + * Process an attr intent item that was recovered from > + * the log. We need to delete the attr that it describes. > + */ > +int > +xfs_attri_recover( > + struct xfs_mount *mp, > + struct xfs_attri_log_item *attrip) > +{ > + struct xfs_attrd_log_item *attrdp; > + struct xfs_trans *tp; > + int error = 0; > + struct xfs_attr_log_format *attrp; > + > + ASSERT(!test_bit(XFS_ATTRI_RECOVERED, &attrip->flags)); > + > + /* > + * First check the validity of the attr described by the > + * ATTRI. If any are bad, then assume that all are bad and > + * just toss the ATTRI. > + */ > + attrp = &attrip->format; > + if (attrp->value_len == 0 || > + attrp->name_len == 0 || > + attrp->op_flags > ATTR_OP_FLAGS_MAX) { > + /* > + * This will pull the ATTRI from the AIL and > + * free the memory associated with it. > + */ > + set_bit(XFS_ATTRI_RECOVERED, &attrip->flags); > + xfs_attri_release(attrip); > + return -EIO; > + } > + > + error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); > + if (error) > + return error; > + attrdp = xfs_trans_get_attrd(tp, attrip); > + attrp = &attrip->format; > + > + error = xfs_trans_attr(tp, attrdp, attrp->ino, > + attrp->op_flags, > + attrp->attr_flags, > + attrp->name_len, > + attrp->value_len, > + attrip->name, > + attrip->value); > + if (error) > + goto abort_error; > + > + > + set_bit(XFS_ATTRI_RECOVERED, &attrip->flags); > + error = xfs_trans_commit(tp); > + return error; > + > +abort_error: > + xfs_trans_cancel(tp); > + return error; > +} > diff --git a/fs/xfs/xfs_attr_item.h b/fs/xfs/xfs_attr_item.h > new file mode 100644 > index 0000000..023675d > --- /dev/null > +++ b/fs/xfs/xfs_attr_item.h > @@ -0,0 +1,111 @@ > +/* > + * Copyright (c) 2017 Oracle, Inc. > + * All Rights Reserved. > + * > + * This program is free software; you can redistribute it and/or > + * modify it under the terms of the GNU General Public License as > + * published by the Free Software Foundation. > + * > + * This program is distributed in the hope that it would be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program; if not, write the Free Software Foundation Inc. > + */ > +#ifndef __XFS_ATTR_ITEM_H__ > +#define __XFS_ATTR_ITEM_H__ > + > +/* kernel only ATTRI/ATTRD definitions */ > + > +struct xfs_mount; > +struct kmem_zone; > + > +/* > + * Max number of attrs in fast allocation path. > + */ > +#define XFS_ATTRI_MAX_FAST_ATTRS 16 Daaaang, we can cram *sixteen* different attribute name/value updates in a single defer_ops item? :) Each defer_ops item gets its own transaction to make changes and log the done item. Sixteen attr updates is a /lot/ to be pushing through one transaction since (AFAICT) the static log reservations provide worst case space for one update. I think this ought to be 1, especially since the actual attr log item structure only appears to have space to store one name and one value. > + > + > +/* > + * Define ATTR flag bits. Manipulated by set/clear/test_bit operators. > + */ > +#define XFS_ATTRI_RECOVERED 1 > + > +/* > + * This is the "attr intention" log item. It is used to log the fact > + * that some attrs need to be processed. It is used in conjunction with the > + * "attr done" log item described below. > + * > + * The ATTRI is reference counted so that it is not freed prior to both the > + * ATTRI and ATTRD being committed and unpinned. This ensures the ATTRI is > + * inserted into the AIL even in the event of out of order ATTRI/ATTRD > + * processing. In other words, an ATTRI is born with two references: > + * > + * 1.) an ATTRI held reference to track ATTRI AIL insertion > + * 2.) an ATTRD held reference to track ATTRD commit > + * > + * On allocation, both references are the responsibility of the caller. Once > + * the ATTRI is added to and dirtied in a transaction, ownership of reference > + * one transfers to the transaction. The reference is dropped once the ATTRI is > + * inserted to the AIL or in the event of failure along the way (e.g., commit > + * failure, log I/O error, etc.). Note that the caller remains responsible for > + * the ATTRD reference under all circumstances to this point. The caller has no > + * means to detect failure once the transaction is committed, however. > + * Therefore, an ATTRD is required after this point, even in the event of > + * unrelated failure. > + * > + * Once an ATTRD is allocated and dirtied in a transaction, reference two > + * transfers to the transaction. The ATTRD reference is dropped once it reaches > + * the unpin handler. Similar to the ATTRI, the reference also drops in the > + * event of commit failure or log I/O errors. Note that the ATTRD is not > + * inserted in the AIL, so at this point both the ATTI and ATTRD are freed. > + */ > +struct xfs_attri_log_item { > + xfs_log_item_t item; > + atomic_t refcount; > + unsigned long flags; /* misc flags */ > + int name_len; > + void *name; > + int value_len; > + void *value; > + struct xfs_attr_log_format format; > +}; > + > +/* > + * This is the "attr done" log item. It is used to log > + * the fact that some attrs earlier mentioned in an attri item > + * have been freed. > + */ > +struct xfs_attrd_log_item { > + struct xfs_log_item item; > + struct xfs_attri_log_item *attrip; > + uint next_attr; > + int name_len; > + void *name; > + int value_len; > + void *value; > + struct xfs_attr_log_format format; > +}; > + > +/* > + * Max number of attrs in fast allocation path. > + */ > +#define XFS_ATTRD_MAX_FAST_ATTRS 16 > + > +extern struct kmem_zone *xfs_attri_zone; > +extern struct kmem_zone *xfs_attrd_zone; > + > +struct xfs_attri_log_item *xfs_attri_init(struct xfs_mount *mp); > +struct xfs_attrd_log_item *xfs_attrd_init(struct xfs_mount *mp, > + struct xfs_attri_log_item *attrip); > +int xfs_attr_copy_format(struct xfs_log_iovec *buf, > + struct xfs_attr_log_format *dst_attri_fmt); > +void xfs_attri_item_free(struct xfs_attri_log_item *attrip); > +void xfs_attri_release(struct xfs_attri_log_item *attrip); > + > +int xfs_attri_recover(struct xfs_mount *mp, > + struct xfs_attri_log_item *attrip); > + > +#endif /* __XFS_ATTR_ITEM_H__ */ > diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c > index ee34899..8326f56 100644 > --- a/fs/xfs/xfs_log_recover.c > +++ b/fs/xfs/xfs_log_recover.c > @@ -33,6 +33,7 @@ > #include "xfs_log_recover.h" > #include "xfs_inode_item.h" > #include "xfs_extfree_item.h" > +#include "xfs_attr_item.h" > #include "xfs_trans_priv.h" > #include "xfs_alloc.h" > #include "xfs_ialloc.h" > @@ -1956,6 +1957,8 @@ xlog_recover_reorder_trans( > case XFS_LI_CUD: > case XFS_LI_BUI: > case XFS_LI_BUD: > + case XFS_LI_ATTRI: > + case XFS_LI_ATTRD: > trace_xfs_log_recover_item_reorder_tail(log, > trans, item, pass); > list_move_tail(&item->ri_list, &inode_list); > @@ -3489,6 +3492,92 @@ xlog_recover_efd_pass2( > return 0; > } > > +STATIC int > +xlog_recover_attri_pass2( > + struct xlog *log, > + struct xlog_recover_item *item, > + xfs_lsn_t lsn) > +{ > + int error; > + struct xfs_mount *mp = log->l_mp; > + struct xfs_attri_log_item *attrip; > + struct xfs_attr_log_format *attri_formatp; > + > + attri_formatp = item->ri_buf[0].i_addr; > + > + attrip = xfs_attri_init(mp); > + error = xfs_attr_copy_format(&item->ri_buf[0], &attrip->format); > + if (error) { > + xfs_attri_item_free(attrip); > + return error; > + } > + > + spin_lock(&log->l_ailp->xa_lock); > + /* > + * The ATTRI has two references. One for the ATTRD and one for ATTRI to > + * ensure it makes it into the AIL. Insert the ATTRI into the AIL > + * directly and drop the ATTRI reference. Note that > + * xfs_trans_ail_update() drops the AIL lock. > + */ > + xfs_trans_ail_update(log->l_ailp, &attrip->item, lsn); > + xfs_attri_release(attrip); > + return 0; > +} > + > + > +/* > + * This routine is called when an ATTRD format structure is found in a committed > + * transaction in the log. Its purpose is to cancel the corresponding ATTRI if > + * it was still in the log. To do this it searches the AIL for the ATTRI with > + * an id equal to that in the ATTRD format structure. If we find it we drop > + * the ATTRD reference, which removes the ATTRI from the AIL and frees it. > + */ > +STATIC int > +xlog_recover_attrd_pass2( > + struct xlog *log, > + struct xlog_recover_item *item) > +{ > + struct xfs_attr_log_format *attrd_formatp; > + struct xfs_attri_log_item *attrip = NULL; > + struct xfs_log_item *lip; > + uint64_t attri_id; > + struct xfs_ail_cursor cur; > + struct xfs_ail *ailp = log->l_ailp; > + > + attrd_formatp = item->ri_buf[0].i_addr; > + ASSERT((item->ri_buf[0].i_len == > + (sizeof(struct xfs_attr_log_format)))); > + attri_id = attrd_formatp->id; > + > + /* > + * Search for the ATTRI with the id in the ATTRD format structure in the > + * AIL. > + */ > + spin_lock(&ailp->xa_lock); > + lip = xfs_trans_ail_cursor_first(ailp, &cur, 0); > + while (lip != NULL) { > + if (lip->li_type == XFS_LI_ATTRI) { > + attrip = (struct xfs_attri_log_item *)lip; > + if (attrip->format.id == attri_id) { > + /* > + * Drop the ATTRD reference to the ATTRI. This > + * removes the ATTRI from the AIL and frees it. > + */ > + spin_unlock(&ailp->xa_lock); > + xfs_attri_release(attrip); > + spin_lock(&ailp->xa_lock); > + break; > + } > + } > + lip = xfs_trans_ail_cursor_next(ailp, &cur); > + } > + > + xfs_trans_ail_cursor_done(&cur); > + spin_unlock(&ailp->xa_lock); > + > + return 0; > +} > + > /* > * This routine is called to create an in-core extent rmap update > * item from the rui format structure which was logged on disk. > @@ -4108,6 +4197,10 @@ xlog_recover_commit_pass2( > return xlog_recover_efi_pass2(log, item, trans->r_lsn); > case XFS_LI_EFD: > return xlog_recover_efd_pass2(log, item); > + case XFS_LI_ATTRI: > + return xlog_recover_attri_pass2(log, item, trans->r_lsn); > + case XFS_LI_ATTRD: > + return xlog_recover_attrd_pass2(log, item); > case XFS_LI_RUI: > return xlog_recover_rui_pass2(log, item, trans->r_lsn); > case XFS_LI_RUD: > @@ -4669,6 +4762,49 @@ xlog_recover_cancel_efi( > spin_lock(&ailp->xa_lock); > } > > +/* Recover the ATTRI if necessary. */ > +STATIC int > +xlog_recover_process_attri( > + struct xfs_mount *mp, > + struct xfs_ail *ailp, > + struct xfs_log_item *lip) > +{ > + struct xfs_attri_log_item *attrip; > + int error; > + > + /* > + * Skip ATTRIs that we've already processed. > + */ > + attrip = container_of(lip, struct xfs_attri_log_item, item); > + if (test_bit(XFS_ATTRI_RECOVERED, &attrip->flags)) > + return 0; > + > + spin_unlock(&ailp->xa_lock); > + error = xfs_attri_recover(mp, attrip); > + spin_lock(&ailp->xa_lock); > + > + return error; > +} > + > +/* Release the ATTRI since we're cancelling everything. */ > +STATIC void > +xlog_recover_cancel_attri( > + struct xfs_mount *mp, > + struct xfs_ail *ailp, > + struct xfs_log_item *lip) > +{ > + struct xfs_attri_log_item *attrip; > + > + attrip = container_of(lip, struct xfs_attri_log_item, item); > + > + spin_unlock(&ailp->xa_lock); > + xfs_attri_release(attrip); > + spin_lock(&ailp->xa_lock); > +} > + > + > + > + > /* Recover the RUI if necessary. */ > STATIC int > xlog_recover_process_rui( > @@ -4861,6 +4997,10 @@ xlog_recover_process_intents( > case XFS_LI_EFI: > error = xlog_recover_process_efi(log->l_mp, ailp, lip); > break; > + case XFS_LI_ATTRI: > + error = xlog_recover_process_attri(log->l_mp, > + ailp, lip); FWIW you're allowed (in xfs land only) to use the double-indent convention: error = xlog_recover_process_attri(log->l_mp, ailp, lip); Instead of spending time lining things up with the '('. > + break; > case XFS_LI_RUI: > error = xlog_recover_process_rui(log->l_mp, ailp, lip); > break; > diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c > index 584cf2d..046ced4 100644 > --- a/fs/xfs/xfs_super.c > +++ b/fs/xfs/xfs_super.c > @@ -2024,6 +2024,7 @@ init_xfs_fs(void) > xfs_rmap_update_init_defer_op(); > xfs_refcount_update_init_defer_op(); > xfs_bmap_update_init_defer_op(); > + xfs_attr_init_defer_op(); > > xfs_dir_startup(); > > diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h > index 815b53d2..d003637 100644 > --- a/fs/xfs/xfs_trans.h > +++ b/fs/xfs/xfs_trans.h > @@ -40,6 +40,9 @@ struct xfs_cud_log_item; > struct xfs_defer_ops; > struct xfs_bui_log_item; > struct xfs_bud_log_item; > +struct xfs_attrd_log_item; > +struct xfs_attri_log_item; > + > > typedef struct xfs_log_item { > struct list_head li_ail; /* AIL pointers */ > @@ -223,12 +226,22 @@ void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *); > void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint); > > void xfs_extent_free_init_defer_op(void); > +void xfs_attr_init_defer_op(void); > + > struct xfs_efd_log_item *xfs_trans_get_efd(struct xfs_trans *, > struct xfs_efi_log_item *, > uint); > int xfs_trans_free_extent(struct xfs_trans *, > struct xfs_efd_log_item *, xfs_fsblock_t, > xfs_extlen_t, struct xfs_owner_info *); > +struct xfs_attrd_log_item * > +xfs_trans_get_attrd(struct xfs_trans *tp, > + struct xfs_attri_log_item *attrip); > +int xfs_trans_attr(struct xfs_trans *tp, struct xfs_attrd_log_item *attrdp, > + xfs_ino_t ino, uint32_t attr_op_flags, uint32_t flags, > + uint32_t name_len, uint32_t value_len, > + char *name, char *value); > + > int xfs_trans_commit(struct xfs_trans *); > int xfs_trans_roll(struct xfs_trans **); > int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *); > diff --git a/fs/xfs/xfs_trans_attr.c b/fs/xfs/xfs_trans_attr.c > new file mode 100644 > index 0000000..39eb18d > --- /dev/null > +++ b/fs/xfs/xfs_trans_attr.c > @@ -0,0 +1,286 @@ > +/* > + * Copyright (c) 2017, Oracle Inc. > + * All Rights Reserved. > + * > + * This program is free software; you can redistribute it and/or > + * modify it under the terms of the GNU General Public License as > + * published by the Free Software Foundation. > + * > + * This program is distributed in the hope that it would be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program; if not, write the Free Software Foundation Inc. > + */ > +#include "xfs.h" > +#include "xfs_fs.h" > +#include "xfs_shared.h" > +#include "xfs_format.h" > +#include "xfs_log_format.h" > +#include "xfs_trans_resv.h" > +#include "xfs_bit.h" > +#include "xfs_mount.h" > +#include "xfs_defer.h" > +#include "xfs_trans.h" > +#include "xfs_trans_priv.h" > +#include "xfs_attr_item.h" > +#include "xfs_alloc.h" > +#include "xfs_bmap.h" > +#include "xfs_trace.h" > +#include "libxfs/xfs_da_format.h" > +#include "xfs_da_btree.h" > +#include "xfs_attr.h" > +#include "xfs_inode.h" > +#include "xfs_icache.h" > + > +/* > + * This routine is called to allocate an "extent free done" > + * log item that will hold nextents worth of extents. The > + * caller must use all nextents extents, because we are not > + * flexible about this at all. > + */ > +struct xfs_attrd_log_item * > +xfs_trans_get_attrd(struct xfs_trans *tp, > + struct xfs_attri_log_item *attrip) > +{ > + struct xfs_attrd_log_item *attrdp; > + > + ASSERT(tp != NULL); > + > + attrdp = xfs_attrd_init(tp->t_mountp, attrip); > + ASSERT(attrdp != NULL); > + > + /* > + * Get a log_item_desc to point at the new item. > + */ > + xfs_trans_add_item(tp, &attrdp->item); > + return attrdp; > +} > + > +/* > + * Delete an attr and log it to the ATTRD. Note that the transaction is marked > + * dirty regardless of whether the attr delete succeeds or fails to support the > + * ATTRI/ATTRD lifecycle rules. > + */ > +int > +xfs_trans_attr( > + struct xfs_trans *tp, > + struct xfs_attrd_log_item *attrdp, > + xfs_ino_t ino, > + uint32_t op_flags, > + uint32_t flags, > + uint32_t name_len, > + uint32_t value_len, > + char *name, > + char *value) > +{ > + uint next_attr; > + struct xfs_attr_log_format *attrp; > + int error; > + int local; > + struct xfs_da_args args; > + struct xfs_inode *dp; > + struct xfs_defer_ops dfops; > + xfs_fsblock_t firstblock = NULLFSBLOCK; > + struct xfs_mount *mp = tp->t_mountp; > + > + error = xfs_iget(mp, tp, ino, flags, 0, &dp); > + if (error) > + return error; > + > + ASSERT(XFS_IFORK_Q((dp))); > + tp->t_flags |= XFS_TRANS_RESERVE; > + > + error = xfs_attr_args_init(&args, dp, name, flags); > + if (error) > + return error; > + > + args.name = name; > + args.namelen = name_len; > + args.hashval = xfs_da_hashname(args.name, args.namelen); > + args.value = value; > + args.valuelen = value_len; > + args.dfops = &dfops; dfops needs an xfs_defer_init(). Oh, the initialization of dfops is after where we start using it. Please move it up (or the args.dfops assignment down). > + args.firstblock = &firstblock; > + args.op_flags = XFS_DA_OP_OKNOENT; > + args.total = xfs_attr_calc_size(&args, &local); > + args.trans = tp; > + ASSERT(local); > + > + xfs_ilock(dp, XFS_ILOCK_EXCL); > + xfs_defer_init(args.dfops, args.firstblock); > + > + if (op_flags & ATTR_OP_FLAGS_SET) { switch (op_flags & XFS_ATTR_OP_FLAGS_TYPE_MASK) { case XFS_ATTR_OP_FLAGS_SET: ... case XFS_ATTR_OP_FLAGS_REMOVE: ... default: ... } > + args.op_flags |= XFS_DA_OP_ADDNAME; > + error = xfs_attr_set_args(&args, flags, false); > + } else if (op_flags & ATTR_OP_FLAGS_REMOVE) { > + error = xfs_attr_remove_args(&args, flags); > + } else { > + ASSERT(0); We're reading and processing log items off the disk, so cleaning up and returning -EFSCORRUPTED is more appropriate here. > + } > + > + if (error) > + xfs_defer_cancel(&dfops); > + > + xfs_iunlock(dp, XFS_ILOCK_EXCL); > + > + /* > + * Mark the transaction dirty, even on error. This ensures the > + * transaction is aborted, which: > + * > + * 1.) releases the ATTRI and frees the ATTRD > + * 2.) shuts down the filesystem > + */ > + tp->t_flags |= XFS_TRANS_DIRTY; > + attrdp->item.li_desc->lid_flags |= XFS_LID_DIRTY; > + > + next_attr = attrdp->next_attr; > + attrp = &(attrdp->format); > + attrp->ino = ino; > + attrp->op_flags = op_flags; > + attrp->value_len = value_len; > + attrp->name_len = name_len; > + attrp->attr_flags = flags; > + > + attrdp->name = name; > + attrdp->value = value; > + attrdp->name_len = name_len; > + attrdp->value_len = value_len; > + attrdp->next_attr++; > + > + return error; > +} > + > +static int > +xfs_attr_diff_items( > + void *priv, > + struct list_head *a, > + struct list_head *b) > +{ > + return 0; > +} > + > +/* Get an ATTRI. */ > +STATIC void * > +xfs_attr_create_intent( > + struct xfs_trans *tp, > + unsigned int count) > +{ > + struct xfs_attri_log_item *attrip; > + > + ASSERT(tp != NULL); > + ASSERT(count > 0); > + > + attrip = xfs_attri_init(tp->t_mountp); > + ASSERT(attrip != NULL); > + > + /* > + * Get a log_item_desc to point at the new item. > + */ > + xfs_trans_add_item(tp, &attrip->item); > + return attrip; > +} > + > +/* Log an attr to the intent item. */ > +STATIC void > +xfs_attr_log_item( > + struct xfs_trans *tp, > + void *intent, > + struct list_head *item) > +{ > + struct xfs_attri_log_item *attrip = intent; > + struct xfs_attr_item *free; > + struct xfs_attr_log_format *attrp; > + > + free = container_of(item, struct xfs_attr_item, xattri_list); > + > + tp->t_flags |= XFS_TRANS_DIRTY; > + attrip->item.li_desc->lid_flags |= XFS_LID_DIRTY; > + > + attrp = &attrip->format; > + attrp->ino = free->xattri_ino; > + attrp->op_flags = free->xattri_op_flags; > + attrp->value_len = free->xattri_value_len; > + attrp->name_len = free->xattri_name_len; > + attrp->attr_flags = free->xattri_flags; > + > + attrip->name = &(free->xattri_name[0]); > + attrip->value = &(free->xattri_value[0]); > + attrip->name_len = free->xattri_name_len; > + attrip->value_len = free->xattri_value_len; > +} > + > +/* Get an ATTRD so we can process all the attrs. */ > +STATIC void * > +xfs_attr_create_done( > + struct xfs_trans *tp, > + void *intent, > + unsigned int count) > +{ > + return xfs_trans_get_attrd(tp, intent); > +} > + > +/* Process an attr. */ > +STATIC int > +xfs_attr_finish_item( > + struct xfs_trans *tp, > + struct xfs_defer_ops *dop, > + struct list_head *item, > + void *done_item, > + void **state) > +{ > + struct xfs_attr_item *free; > + int error; > + > + free = container_of(item, struct xfs_attr_item, xattri_list); > + error = xfs_trans_attr(tp, done_item, > + free->xattri_ino, > + free->xattri_op_flags, > + free->xattri_flags, > + free->xattri_name_len, > + free->xattri_value_len, > + free->xattri_name, > + free->xattri_value); > + kmem_free(free); > + return error; > +} > + > +/* Abort all pending EFIs. */ EFIs? --D > +STATIC void > +xfs_attr_abort_intent( > + void *intent) > +{ > + xfs_attri_release(intent); > +} > + > +/* Cancel an attr */ > +STATIC void > +xfs_attr_cancel_item( > + struct list_head *item) > +{ > + struct xfs_attr_item *free; > + > + free = container_of(item, struct xfs_attr_item, xattri_list); > + kmem_free(free); > +} > + > +static const struct xfs_defer_op_type xfs_attr_defer_type = { > + .type = XFS_DEFER_OPS_TYPE_ATTR, > + .max_items = XFS_ATTRI_MAX_FAST_ATTRS, > + .diff_items = xfs_attr_diff_items, > + .create_intent = xfs_attr_create_intent, > + .abort_intent = xfs_attr_abort_intent, > + .log_item = xfs_attr_log_item, > + .create_done = xfs_attr_create_done, > + .finish_item = xfs_attr_finish_item, > + .cancel_item = xfs_attr_cancel_item, > +}; > + > +/* Register the deferred op type. */ > +void > +xfs_attr_init_defer_op(void) > +{ > + xfs_defer_init_op_type(&xfs_attr_defer_type); > +} > -- > 2.7.4 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-xfs" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 10/19/2017 12:02 PM, Darrick J. Wong wrote: > On Wed, Oct 18, 2017 at 03:55:18PM -0700, Allison Henderson wrote: >> This patch adds two new log item types for setting or >> removing attributes as deferred operations. The >> xfs_attri_log_item logs an intent to set or remove an >> attribute. The corresponding xfs_attrd_log_item holds >> a reference to the xfs_attri_log_item and is freed once >> the transaction is done. Both log items use a generic >> xfs_attr_log_format structure that contains the attribute >> name, value, flags, inode, and an op_flag that indicates >> if the operations is a set or remove. >> >> At the moment, this feature will only be used by the parent >> pointer patch set which uses attributes to store information >> about an inodes parent. >> >> Signed-off-by: Allison Henderson<allison.henderson@oracle.com> >> --- >> fs/xfs/Makefile | 2 + >> fs/xfs/libxfs/xfs_attr.c | 2 +- >> fs/xfs/libxfs/xfs_defer.h | 1 + >> fs/xfs/libxfs/xfs_log_format.h | 36 ++- >> fs/xfs/libxfs/xfs_types.h | 1 + >> fs/xfs/xfs_attr.h | 20 +- >> fs/xfs/xfs_attr_item.c | 512 +++++++++++++++++++++++++++++++++++++++++ >> fs/xfs/xfs_attr_item.h | 111 +++++++++ >> fs/xfs/xfs_log_recover.c | 140 +++++++++++ >> fs/xfs/xfs_super.c | 1 + >> fs/xfs/xfs_trans.h | 13 ++ >> fs/xfs/xfs_trans_attr.c | 286 +++++++++++++++++++++++ >> 12 files changed, 1121 insertions(+), 4 deletions(-) >> >> diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile >> index a6e955b..ec6486b 100644 >> --- a/fs/xfs/Makefile >> +++ b/fs/xfs/Makefile >> @@ -106,6 +106,7 @@ xfs-y += xfs_log.o \ >> xfs_bmap_item.o \ >> xfs_buf_item.o \ >> xfs_extfree_item.o \ >> + xfs_attr_item.o \ >> xfs_icreate_item.o \ >> xfs_inode_item.o \ >> xfs_refcount_item.o \ >> @@ -115,6 +116,7 @@ xfs-y += xfs_log.o \ >> xfs_trans_bmap.o \ >> xfs_trans_buf.o \ >> xfs_trans_extfree.o \ >> + xfs_trans_attr.o \ >> xfs_trans_inode.o \ >> xfs_trans_refcount.o \ >> xfs_trans_rmap.o \ >> diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c >> index b00ec1f..5325ec2 100644 >> --- a/fs/xfs/libxfs/xfs_attr.c >> +++ b/fs/xfs/libxfs/xfs_attr.c >> @@ -74,7 +74,7 @@ STATIC int xfs_attr_fillstate(xfs_da_state_t *state); >> STATIC int xfs_attr_refillstate(xfs_da_state_t *state); >> >> >> -STATIC int >> +int >> xfs_attr_args_init( >> struct xfs_da_args *args, >> struct xfs_inode *dp, >> diff --git a/fs/xfs/libxfs/xfs_defer.h b/fs/xfs/libxfs/xfs_defer.h >> index d4f046d..ef0f8bf 100644 >> --- a/fs/xfs/libxfs/xfs_defer.h >> +++ b/fs/xfs/libxfs/xfs_defer.h >> @@ -55,6 +55,7 @@ enum xfs_defer_ops_type { >> XFS_DEFER_OPS_TYPE_REFCOUNT, >> XFS_DEFER_OPS_TYPE_RMAP, >> XFS_DEFER_OPS_TYPE_FREE, >> + XFS_DEFER_OPS_TYPE_ATTR, >> XFS_DEFER_OPS_TYPE_MAX, >> }; >> >> diff --git a/fs/xfs/libxfs/xfs_log_format.h b/fs/xfs/libxfs/xfs_log_format.h >> index 8372e9b..b0ce87e 100644 >> --- a/fs/xfs/libxfs/xfs_log_format.h >> +++ b/fs/xfs/libxfs/xfs_log_format.h >> @@ -18,6 +18,8 @@ >> #ifndef __XFS_LOG_FORMAT_H__ >> #define __XFS_LOG_FORMAT_H__ >> >> +#include "xfs_attr.h" >> + >> struct xfs_mount; >> struct xfs_trans_res; >> >> @@ -116,7 +118,12 @@ static inline uint xlog_get_cycle(char *ptr) >> #define XLOG_REG_TYPE_CUD_FORMAT 24 >> #define XLOG_REG_TYPE_BUI_FORMAT 25 >> #define XLOG_REG_TYPE_BUD_FORMAT 26 >> -#define XLOG_REG_TYPE_MAX 26 >> +#define XLOG_REG_TYPE_ATTRI_FORMAT 27 >> +#define XLOG_REG_TYPE_ATTRD_FORMAT 28 >> +#define XLOG_REG_TYPE_ATTR_NAME 29 >> +#define XLOG_REG_TYPE_ATTR_VALUE 30 >> +#define XLOG_REG_TYPE_MAX 31 >> + >> >> /* >> * Flags to log operation header >> @@ -239,6 +246,8 @@ typedef struct xfs_trans_header { >> #define XFS_LI_CUD 0x1243 >> #define XFS_LI_BUI 0x1244 /* bmbt update intent */ >> #define XFS_LI_BUD 0x1245 >> +#define XFS_LI_ATTRI 0x1246 /* attr set/remove intent*/ >> +#define XFS_LI_ATTRD 0x1247 /* attr set/remove done */ >> >> #define XFS_LI_TYPE_DESC \ >> { XFS_LI_EFI, "XFS_LI_EFI" }, \ >> @@ -254,7 +263,9 @@ typedef struct xfs_trans_header { >> { XFS_LI_CUI, "XFS_LI_CUI" }, \ >> { XFS_LI_CUD, "XFS_LI_CUD" }, \ >> { XFS_LI_BUI, "XFS_LI_BUI" }, \ >> - { XFS_LI_BUD, "XFS_LI_BUD" } >> + { XFS_LI_BUD, "XFS_LI_BUD" }, \ >> + { XFS_LI_ATTRI, "XFS_LI_ATTRI" }, \ >> + { XFS_LI_ATTRD, "XFS_LI_ATTRD" } >> >> /* >> * Inode Log Item Format definitions. >> @@ -863,4 +874,25 @@ struct xfs_icreate_log { >> __be32 icl_gen; /* inode generation number to use */ >> }; >> >> +/* Flags for deferred attribute operations */ >> +#define ATTR_OP_FLAGS_SET 0x01 /* Set the attribute */ > The names need to have "XFS_" prefixed here because this is a public > header file, e.g. XFS_ATTR_OP_FLAGS_SET. OK, will fix >> +#define ATTR_OP_FLAGS_REMOVE 0x02 /* Remove the attribute */ >> +#define ATTR_OP_FLAGS_MAX 0x02 /* Max flags */ > I would be a little more explicit about which bits of op_flags are > actual bit flags and which parts are mutually exclusive type codes. > IOWs, from just these definitions here it's not clear that _SET and > _REMOVE can't both be set at the same time. > > /* upper bits are flags, lower byte is type code */ > #define XFS_ATTR_OP_FLAGS_SET 1 > #define XFS_ATTR_OP_FLAGS_REMOVE 2 > #define XFS_ATTR_OP_FLAGS_TYPE_MASK 0xFF > > (TBH this opcode part could be an enum defined elsewhere like what RUI > pe_flags does...) > > #define XFS_ATTR_OP_FLAGS_AFLAG (1U << 31) > #define XFS_ATTR_OP_FLAGS_SOMEOTHERFLAG (1U << 30) > Sure that makes sense. Will update. >> + >> +/* >> + * This is the structure used to lay out an attr log item in the >> + * log. >> + */ >> +struct xfs_attr_log_format { >> + uint64_t id; /* attri identifier */ >> + xfs_ino_t ino; /* the inode for this attr operation */ >> + uint32_t op_flags; /* marks the op as a set or remove */ >> + uint32_t name_len; /* attr name length */ >> + uint32_t value_len; /* attr value length */ >> + uint32_t attr_flags; /* attr flags */ >> + uint16_t type; /* attri log item type */ >> + uint16_t size; /* size of this item */ >> + uint32_t pad; /* pad to 64 bit aligned */ > The names ought to have structure prefixes because this is a public header. > > uint64_t alf_id; > uint64_t alf_ino; > ... > uint32_t alf_pad; > Alrighty, will do >> +}; >> + >> #endif /* __XFS_LOG_FORMAT_H__ */ >> diff --git a/fs/xfs/libxfs/xfs_types.h b/fs/xfs/libxfs/xfs_types.h >> index 0220159..5372063 100644 >> --- a/fs/xfs/libxfs/xfs_types.h >> +++ b/fs/xfs/libxfs/xfs_types.h >> @@ -23,6 +23,7 @@ typedef uint32_t prid_t; /* project ID */ >> typedef uint32_t xfs_agblock_t; /* blockno in alloc. group */ >> typedef uint32_t xfs_agino_t; /* inode # within allocation grp */ >> typedef uint32_t xfs_extlen_t; /* extent length in blocks */ >> +typedef uint32_t xfs_attrlen_t; /* attr length */ >> typedef uint32_t xfs_agnumber_t; /* allocation group number */ >> typedef int32_t xfs_extnum_t; /* # of extents in a file */ >> typedef int16_t xfs_aextnum_t; /* # extents in an attribute fork */ >> diff --git a/fs/xfs/xfs_attr.h b/fs/xfs/xfs_attr.h >> index 8542606..34bb4cb 100644 >> --- a/fs/xfs/xfs_attr.h >> +++ b/fs/xfs/xfs_attr.h >> @@ -18,6 +18,8 @@ >> #ifndef __XFS_ATTR_H__ >> #define __XFS_ATTR_H__ >> >> +#include "libxfs/xfs_defer.h" > What does this header file need from xfs_defer.h? > >> struct xfs_inode; >> struct xfs_da_args; >> struct xfs_attr_list_context; >> @@ -87,6 +89,20 @@ typedef struct attrlist_ent { /* data from attr_list() */ >> } attrlist_ent_t; >> >> /* >> + * List of attrs to commit later. >> + */ >> +struct xfs_attr_item { >> + xfs_ino_t xattri_ino; >> + uint32_t xattri_op_flags; >> + uint32_t xattri_value_len; /* length of name and val */ >> + uint32_t xattri_name_len; /* length of name */ >> + uint32_t xattri_flags; /* attr flags */ >> + char xattri_name[XATTR_NAME_MAX]; >> + char xattri_value[XATTR_SIZE_MAX]; > MAXNAMELEN and XFS_XATTR_SIZE_MAX ? > > (Ugh, really, we should just clean that up to XFS_MAXNAMELEN...) > Yeah, I think you suggest using a "xattri_namevalue[0];" here in the next patch review. I'll just pull all the array stuff out.... >> + struct list_head xattri_list; >> +}; >> + >> +/* >> * Given a pointer to the (char*) buffer containing the attr_list() result, >> * and an index, return a pointer to the indicated attribute in the buffer. >> */ >> @@ -154,6 +170,8 @@ int xfs_attr_remove(struct xfs_inode *dp, const unsigned char *name, int flags); >> int xfs_attr_remove_args(struct xfs_da_args *args, int flags); >> int xfs_attr_list(struct xfs_inode *dp, char *buffer, int bufsize, >> int flags, struct attrlist_cursor_kern *cursor); >> - >> +int xfs_attr_args_init(struct xfs_da_args *args, struct xfs_inode *dp, >> + const unsigned char *name, int flags); >> +int xfs_attr_calc_size(struct xfs_da_args *args, int *local); >> >> #endif /* __XFS_ATTR_H__ */ >> diff --git a/fs/xfs/xfs_attr_item.c b/fs/xfs/xfs_attr_item.c >> new file mode 100644 >> index 0000000..8cbe9b0 >> --- /dev/null >> +++ b/fs/xfs/xfs_attr_item.c >> @@ -0,0 +1,512 @@ >> +/* >> + * Copyright (c) 2017 Oracle, Inc. >> + * All Rights Reserved. >> + * >> + * This program is free software; you can redistribute it and/or >> + * modify it under the terms of the GNU General Public License as >> + * published by the Free Software Foundation. >> + * >> + * This program is distributed in the hope that it would be useful, >> + * but WITHOUT ANY WARRANTY; without even the implied warranty of >> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the >> + * GNU General Public License for more details. >> + * >> + * You should have received a copy of the GNU General Public License >> + * along with this program; if not, write the Free Software Foundation Inc. >> + */ >> +#include "xfs.h" >> +#include "xfs_fs.h" >> +#include "xfs_format.h" >> +#include "xfs_log_format.h" >> +#include "xfs_trans_resv.h" >> +#include "xfs_bit.h" >> +#include "xfs_mount.h" >> +#include "xfs_trans.h" >> +#include "xfs_trans_priv.h" >> +#include "xfs_buf_item.h" >> +#include "xfs_attr_item.h" >> +#include "xfs_log.h" >> +#include "xfs_btree.h" >> +#include "xfs_rmap.h" >> + >> + >> +static inline struct xfs_attri_log_item *ATTRI_ITEM(struct xfs_log_item *lip) >> +{ >> + return container_of(lip, struct xfs_attri_log_item, item); >> +} >> + >> +void >> +xfs_attri_item_free( >> + struct xfs_attri_log_item *attrip) >> +{ >> + kmem_free(attrip->item.li_lv_shadow); >> + kmem_free(attrip); >> +} >> + >> +/* >> + * This returns the number of iovecs needed to log the given attri item. >> + * We only need 1 iovec for an attri item. It just logs the attr_log_format >> + * structure. >> + */ >> +static inline int >> +xfs_attri_item_sizeof( >> + struct xfs_attri_log_item *attrip) >> +{ >> + return sizeof(struct xfs_attr_log_format); >> +} >> + >> +STATIC void >> +xfs_attri_item_size( >> + struct xfs_log_item *lip, >> + int *nvecs, >> + int *nbytes) >> +{ >> + struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip); >> + >> + *nvecs += 1; >> + *nbytes += xfs_attri_item_sizeof(attrip); >> + >> + if (attrip->name_len > 0) { >> + *nvecs += 1; >> + nbytes += attrip->name_len; >> + } >> + >> + if (attrip->value_len > 0) { >> + *nvecs += 1; >> + nbytes += attrip->value_len; >> + } >> +} >> + >> +/* >> + * This is called to fill in the vector of log iovecs for the >> + * given attri log item. We use only 1 iovec, and we point that >> + * at the attri_log_format structure embedded in the attri item. >> + * It is at this point that we assert that all of the attr >> + * slots in the attri item have been filled. >> + */ >> +STATIC void >> +xfs_attri_item_format( >> + struct xfs_log_item *lip, >> + struct xfs_log_vec *lv) >> +{ >> + struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip); >> + struct xfs_log_iovec *vecp = NULL; >> + >> + attrip->format.type = XFS_LI_ATTRI; >> + attrip->format.size = 1; >> + >> + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTRI_FORMAT, >> + &attrip->format, >> + xfs_attri_item_sizeof(attrip)); >> + if (attrip->name_len > 0) >> + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTR_NAME, >> + attrip->name, attrip->name_len); >> + >> + if (attrip->value_len > 0) >> + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTR_VALUE, >> + attrip->value, attrip->value_len); >> +} >> + >> + >> +/* >> + * Pinning has no meaning for an attri item, so just return. >> + */ >> +STATIC void >> +xfs_attri_item_pin( >> + struct xfs_log_item *lip) >> +{ >> +} >> + >> +/* >> + * The unpin operation is the last place an ATTRI is manipulated in the log. It >> + * is either inserted in the AIL or aborted in the event of a log I/O error. In >> + * either case, the EFI transaction has been successfully committed to make it > EFI? Typo left over from extent free intent code that I used as a template.... Will fix :-) >> + * this far. Therefore, we expect whoever committed the ATTRI to either >> + * construct and commit the ATTRD or drop the ATTRD's reference in the event of >> + * error. Simply drop the log's ATTRI reference now that the log is done with >> + * it. >> + */ >> +STATIC void >> +xfs_attri_item_unpin( >> + struct xfs_log_item *lip, >> + int remove) >> +{ >> + struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip); >> + >> + xfs_attri_release(attrip); >> +} >> + >> +/* >> + * attri items have no locking or pushing. However, since ATTRIs are pulled >> + * from the AIL when their corresponding ATTRDs are committed to disk, their >> + * situation is very similar to being pinned. Return XFS_ITEM_PINNED so that >> + * the caller will eventually flush the log. This should help in getting the >> + * ATTRI out of the AIL. >> + */ >> +STATIC uint >> +xfs_attri_item_push( >> + struct xfs_log_item *lip, >> + struct list_head *buffer_list) >> +{ >> + return XFS_ITEM_PINNED; >> +} >> + >> +/* >> + * The ATTRI has been either committed or aborted if the transaction has been >> + * cancelled. If the transaction was cancelled, an ATTRD isn't going to be >> + * constructed and thus we free the ATTRI here directly. >> + */ >> +STATIC void >> +xfs_attri_item_unlock( >> + struct xfs_log_item *lip) >> +{ >> + if (lip->li_flags & XFS_LI_ABORTED) >> + xfs_attri_item_free(ATTRI_ITEM(lip)); >> +} >> + >> +/* >> + * The ATTRI is logged only once and cannot be moved in the log, so simply >> + * return the lsn at which it's been logged. >> + */ >> +STATIC xfs_lsn_t >> +xfs_attri_item_committed( >> + struct xfs_log_item *lip, >> + xfs_lsn_t lsn) >> +{ >> + return lsn; >> +} >> + >> +STATIC void >> +xfs_attri_item_committing( >> + struct xfs_log_item *lip, >> + xfs_lsn_t lsn) >> +{ >> +} >> + >> +/* >> + * This is the ops vector shared by all attri log items. >> + */ >> +static const struct xfs_item_ops xfs_attri_item_ops = { >> + .iop_size = xfs_attri_item_size, >> + .iop_format = xfs_attri_item_format, >> + .iop_pin = xfs_attri_item_pin, >> + .iop_unpin = xfs_attri_item_unpin, >> + .iop_unlock = xfs_attri_item_unlock, >> + .iop_committed = xfs_attri_item_committed, >> + .iop_push = xfs_attri_item_push, >> + .iop_committing = xfs_attri_item_committing >> +}; >> + >> + >> +/* >> + * Allocate and initialize an attri item >> + */ >> +struct xfs_attri_log_item * >> +xfs_attri_init( >> + struct xfs_mount *mp) >> + >> +{ >> + struct xfs_attri_log_item *attrip; >> + uint size; >> + >> + size = (uint)(sizeof(struct xfs_attri_log_item)); >> + attrip = kmem_zalloc(size, KM_SLEEP); >> + >> + xfs_log_item_init(mp, &(attrip->item), XFS_LI_ATTRI, >> + &xfs_attri_item_ops); >> + attrip->format.id = (uintptr_t)(void *)attrip; >> + atomic_set(&attrip->refcount, 2); >> + >> + return attrip; >> +} >> + >> +/* >> + * Copy an attr format buffer from the given buf, and into the destination >> + * attr format structure. >> + */ >> +int >> +xfs_attr_copy_format(struct xfs_log_iovec *buf, >> + struct xfs_attr_log_format *dst_attr_fmt) >> +{ >> + struct xfs_attr_log_format *src_attr_fmt = buf->i_addr; >> + uint len = sizeof(struct xfs_attr_log_format); >> + >> + if (buf->i_len == len) { >> + memcpy((char *)dst_attr_fmt, (char *)src_attr_fmt, len); >> + return 0; >> + } >> + return -EFSCORRUPTED; >> +} >> + >> +/* >> + * Freeing the attri requires that we remove it from the AIL if it has already >> + * been placed there. However, the ATTRI may not yet have been placed in the >> + * AIL when called by xfs_attri_release() from ATTRD processing due to the >> + * ordering of committed vs unpin operations in bulk insert operations. Hence >> + * the reference count to ensure only the last caller frees the ATTRI. >> + */ >> +void >> +xfs_attri_release( >> + struct xfs_attri_log_item *attrip) >> +{ >> + ASSERT(atomic_read(&attrip->refcount) > 0); >> + if (atomic_dec_and_test(&attrip->refcount)) { >> + xfs_trans_ail_remove(&attrip->item, >> + SHUTDOWN_LOG_IO_ERROR); >> + xfs_attri_item_free(attrip); >> + } >> +} >> + >> +static inline struct xfs_attrd_log_item *ATTRD_ITEM(struct xfs_log_item *lip) >> +{ >> + return container_of(lip, struct xfs_attrd_log_item, item); >> +} >> + >> +STATIC void >> +xfs_attrd_item_free(struct xfs_attrd_log_item *attrdp) >> +{ >> + kmem_free(attrdp->item.li_lv_shadow); >> + kmem_free(attrdp); >> +} >> + >> +/* >> + * This returns the number of iovecs needed to log the given attrd item. >> + * We only need 1 iovec for an attrd item. It just logs the attr_log_format >> + * structure. >> + */ >> +static inline int >> +xfs_attrd_item_sizeof( >> + struct xfs_attrd_log_item *attrdp) >> +{ >> + return sizeof(struct xfs_attr_log_format); >> +} >> + >> +STATIC void >> +xfs_attrd_item_size( >> + struct xfs_log_item *lip, >> + int *nvecs, >> + int *nbytes) >> +{ >> + struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip); >> + *nvecs += 1; >> + *nbytes += xfs_attrd_item_sizeof(attrdp); >> + >> + if (attrdp->name_len > 0) { >> + *nvecs += 1; >> + nbytes += attrdp->name_len; >> + } >> + >> + if (attrdp->value_len > 0) { >> + *nvecs += 1; >> + nbytes += attrdp->value_len; >> + } >> +} >> + >> +/* >> + * This is called to fill in the vector of log iovecs for the >> + * given attrd log item. We use only 1 iovec, and we point that >> + * at the attr_log_format structure embedded in the attrd item. >> + * It is at this point that we assert that all of the attr >> + * slots in the attrd item have been filled. >> + */ >> +STATIC void >> +xfs_attrd_item_format( >> + struct xfs_log_item *lip, >> + struct xfs_log_vec *lv) >> +{ >> + struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip); >> + struct xfs_log_iovec *vecp = NULL; >> + >> + attrdp->format.type = XFS_LI_ATTRD; >> + attrdp->format.size = 1; >> + >> + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTRD_FORMAT, >> + &attrdp->format, >> + xfs_attrd_item_sizeof(attrdp)); >> + >> + if (attrdp->name_len > 0) >> + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTR_NAME, >> + attrdp->name, attrdp->name_len); >> + >> + if (attrdp->value_len > 0) >> + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTR_VALUE, >> + attrdp->value, attrdp->value_len); > No need to log name/value for ATTRD items, since we only care about > matching alf_id between ATTRI and ATTRD items. Alrighty >> +} >> + >> +/* >> + * Pinning has no meaning for an attrd item, so just return. >> + */ >> +STATIC void >> +xfs_attrd_item_pin( >> + struct xfs_log_item *lip) >> +{ >> +} >> + >> +/* >> + * Since pinning has no meaning for an attrd item, unpinning does >> + * not either. >> + */ >> +STATIC void >> +xfs_attrd_item_unpin( >> + struct xfs_log_item *lip, >> + int remove) >> +{ >> +} >> + >> +/* >> + * There isn't much you can do to push on an attrd item. It is simply stuck >> + * waiting for the log to be flushed to disk. >> + */ >> +STATIC uint >> +xfs_attrd_item_push( >> + struct xfs_log_item *lip, >> + struct list_head *buffer_list) >> +{ >> + return XFS_ITEM_PINNED; >> +} >> + >> +/* >> + * The ATTRD is either committed or aborted if the transaction is cancelled. If >> + * the transaction is cancelled, drop our reference to the ATTRI and free the >> + * ATTRD. >> + */ >> +STATIC void >> +xfs_attrd_item_unlock( >> + struct xfs_log_item *lip) >> +{ >> + struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip); >> + >> + if (lip->li_flags & XFS_LI_ABORTED) { >> + xfs_attri_release(attrdp->attrip); >> + xfs_attrd_item_free(attrdp); >> + } >> +} >> + >> +/* >> + * When the attrd item is committed to disk, all we need to do is delete our >> + * reference to our partner attri item and then free ourselves. Since we're >> + * freeing ourselves we must return -1 to keep the transaction code from >> + * further referencing this item. >> + */ >> +STATIC xfs_lsn_t >> +xfs_attrd_item_committed( >> + struct xfs_log_item *lip, >> + xfs_lsn_t lsn) >> +{ >> + struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip); >> + >> + /* >> + * Drop the ATTRI reference regardless of whether the ATTRD has been >> + * aborted. Once the ATTRD transaction is constructed, it is the sole >> + * responsibility of the ATTRD to release the ATTRI (even if the ATTRI >> + * is aborted due to log I/O error). >> + */ >> + xfs_attri_release(attrdp->attrip); >> + xfs_attrd_item_free(attrdp); >> + >> + return (xfs_lsn_t)-1; >> +} >> + >> +STATIC void >> +xfs_attrd_item_committing( >> + struct xfs_log_item *lip, >> + xfs_lsn_t lsn) >> +{ >> +} >> + >> +/* >> + * This is the ops vector shared by all attrd log items. >> + */ >> +static const struct xfs_item_ops xfs_attrd_item_ops = { >> + .iop_size = xfs_attrd_item_size, >> + .iop_format = xfs_attrd_item_format, >> + .iop_pin = xfs_attrd_item_pin, >> + .iop_unpin = xfs_attrd_item_unpin, >> + .iop_unlock = xfs_attrd_item_unlock, >> + .iop_committed = xfs_attrd_item_committed, >> + .iop_push = xfs_attrd_item_push, >> + .iop_committing = xfs_attrd_item_committing >> +}; >> + >> +/* >> + * Allocate and initialize an attrd item >> + */ >> +struct xfs_attrd_log_item * >> +xfs_attrd_init( >> + struct xfs_mount *mp, >> + struct xfs_attri_log_item *attrip) >> + >> +{ >> + struct xfs_attrd_log_item *attrdp; >> + uint size; >> + >> + size = (uint)(sizeof(struct xfs_attrd_log_item)); >> + attrdp = kmem_zalloc(size, KM_SLEEP); >> + >> + xfs_log_item_init(mp, &attrdp->item, XFS_LI_ATTRD, >> + &xfs_attrd_item_ops); >> + attrdp->attrip = attrip; >> + attrdp->format.id = attrip->format.id; >> + >> + return attrdp; >> +} >> + >> +/* >> + * Process an attr intent item that was recovered from >> + * the log. We need to delete the attr that it describes. >> + */ >> +int >> +xfs_attri_recover( >> + struct xfs_mount *mp, >> + struct xfs_attri_log_item *attrip) >> +{ >> + struct xfs_attrd_log_item *attrdp; >> + struct xfs_trans *tp; >> + int error = 0; >> + struct xfs_attr_log_format *attrp; >> + >> + ASSERT(!test_bit(XFS_ATTRI_RECOVERED, &attrip->flags)); >> + >> + /* >> + * First check the validity of the attr described by the >> + * ATTRI. If any are bad, then assume that all are bad and >> + * just toss the ATTRI. >> + */ >> + attrp = &attrip->format; >> + if (attrp->value_len == 0 || >> + attrp->name_len == 0 || >> + attrp->op_flags > ATTR_OP_FLAGS_MAX) { >> + /* >> + * This will pull the ATTRI from the AIL and >> + * free the memory associated with it. >> + */ >> + set_bit(XFS_ATTRI_RECOVERED, &attrip->flags); >> + xfs_attri_release(attrip); >> + return -EIO; >> + } >> + >> + error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); >> + if (error) >> + return error; >> + attrdp = xfs_trans_get_attrd(tp, attrip); >> + attrp = &attrip->format; >> + >> + error = xfs_trans_attr(tp, attrdp, attrp->ino, >> + attrp->op_flags, >> + attrp->attr_flags, >> + attrp->name_len, >> + attrp->value_len, >> + attrip->name, >> + attrip->value); >> + if (error) >> + goto abort_error; >> + >> + >> + set_bit(XFS_ATTRI_RECOVERED, &attrip->flags); >> + error = xfs_trans_commit(tp); >> + return error; >> + >> +abort_error: >> + xfs_trans_cancel(tp); >> + return error; >> +} >> diff --git a/fs/xfs/xfs_attr_item.h b/fs/xfs/xfs_attr_item.h >> new file mode 100644 >> index 0000000..023675d >> --- /dev/null >> +++ b/fs/xfs/xfs_attr_item.h >> @@ -0,0 +1,111 @@ >> +/* >> + * Copyright (c) 2017 Oracle, Inc. >> + * All Rights Reserved. >> + * >> + * This program is free software; you can redistribute it and/or >> + * modify it under the terms of the GNU General Public License as >> + * published by the Free Software Foundation. >> + * >> + * This program is distributed in the hope that it would be useful, >> + * but WITHOUT ANY WARRANTY; without even the implied warranty of >> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the >> + * GNU General Public License for more details. >> + * >> + * You should have received a copy of the GNU General Public License >> + * along with this program; if not, write the Free Software Foundation Inc. >> + */ >> +#ifndef __XFS_ATTR_ITEM_H__ >> +#define __XFS_ATTR_ITEM_H__ >> + >> +/* kernel only ATTRI/ATTRD definitions */ >> + >> +struct xfs_mount; >> +struct kmem_zone; >> + >> +/* >> + * Max number of attrs in fast allocation path. >> + */ >> +#define XFS_ATTRI_MAX_FAST_ATTRS 16 > Daaaang, we can cram *sixteen* different attribute name/value updates in > a single defer_ops item? :) > > Each defer_ops item gets its own transaction to make changes and log the > done item. Sixteen attr updates is a /lot/ to be pushing through one > transaction since (AFAICT) the static log reservations provide worst > case space for one update. I think this ought to be 1, especially since > the actual attr log item structure only appears to have space to store > one name and one value. Ok, that sounds reasonable. :-) I likely forgot to come back and update it from what extent free had it set to. Thx for the catch! >> + >> + >> +/* >> + * Define ATTR flag bits. Manipulated by set/clear/test_bit operators. >> + */ >> +#define XFS_ATTRI_RECOVERED 1 >> + >> +/* >> + * This is the "attr intention" log item. It is used to log the fact >> + * that some attrs need to be processed. It is used in conjunction with the >> + * "attr done" log item described below. >> + * >> + * The ATTRI is reference counted so that it is not freed prior to both the >> + * ATTRI and ATTRD being committed and unpinned. This ensures the ATTRI is >> + * inserted into the AIL even in the event of out of order ATTRI/ATTRD >> + * processing. In other words, an ATTRI is born with two references: >> + * >> + * 1.) an ATTRI held reference to track ATTRI AIL insertion >> + * 2.) an ATTRD held reference to track ATTRD commit >> + * >> + * On allocation, both references are the responsibility of the caller. Once >> + * the ATTRI is added to and dirtied in a transaction, ownership of reference >> + * one transfers to the transaction. The reference is dropped once the ATTRI is >> + * inserted to the AIL or in the event of failure along the way (e.g., commit >> + * failure, log I/O error, etc.). Note that the caller remains responsible for >> + * the ATTRD reference under all circumstances to this point. The caller has no >> + * means to detect failure once the transaction is committed, however. >> + * Therefore, an ATTRD is required after this point, even in the event of >> + * unrelated failure. >> + * >> + * Once an ATTRD is allocated and dirtied in a transaction, reference two >> + * transfers to the transaction. The ATTRD reference is dropped once it reaches >> + * the unpin handler. Similar to the ATTRI, the reference also drops in the >> + * event of commit failure or log I/O errors. Note that the ATTRD is not >> + * inserted in the AIL, so at this point both the ATTI and ATTRD are freed. >> + */ >> +struct xfs_attri_log_item { >> + xfs_log_item_t item; >> + atomic_t refcount; >> + unsigned long flags; /* misc flags */ >> + int name_len; >> + void *name; >> + int value_len; >> + void *value; >> + struct xfs_attr_log_format format; >> +}; >> + >> +/* >> + * This is the "attr done" log item. It is used to log >> + * the fact that some attrs earlier mentioned in an attri item >> + * have been freed. >> + */ >> +struct xfs_attrd_log_item { >> + struct xfs_log_item item; >> + struct xfs_attri_log_item *attrip; >> + uint next_attr; >> + int name_len; >> + void *name; >> + int value_len; >> + void *value; >> + struct xfs_attr_log_format format; >> +}; >> + >> +/* >> + * Max number of attrs in fast allocation path. >> + */ >> +#define XFS_ATTRD_MAX_FAST_ATTRS 16 >> + >> +extern struct kmem_zone *xfs_attri_zone; >> +extern struct kmem_zone *xfs_attrd_zone; >> + >> +struct xfs_attri_log_item *xfs_attri_init(struct xfs_mount *mp); >> +struct xfs_attrd_log_item *xfs_attrd_init(struct xfs_mount *mp, >> + struct xfs_attri_log_item *attrip); >> +int xfs_attr_copy_format(struct xfs_log_iovec *buf, >> + struct xfs_attr_log_format *dst_attri_fmt); >> +void xfs_attri_item_free(struct xfs_attri_log_item *attrip); >> +void xfs_attri_release(struct xfs_attri_log_item *attrip); >> + >> +int xfs_attri_recover(struct xfs_mount *mp, >> + struct xfs_attri_log_item *attrip); >> + >> +#endif /* __XFS_ATTR_ITEM_H__ */ >> diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c >> index ee34899..8326f56 100644 >> --- a/fs/xfs/xfs_log_recover.c >> +++ b/fs/xfs/xfs_log_recover.c >> @@ -33,6 +33,7 @@ >> #include "xfs_log_recover.h" >> #include "xfs_inode_item.h" >> #include "xfs_extfree_item.h" >> +#include "xfs_attr_item.h" >> #include "xfs_trans_priv.h" >> #include "xfs_alloc.h" >> #include "xfs_ialloc.h" >> @@ -1956,6 +1957,8 @@ xlog_recover_reorder_trans( >> case XFS_LI_CUD: >> case XFS_LI_BUI: >> case XFS_LI_BUD: >> + case XFS_LI_ATTRI: >> + case XFS_LI_ATTRD: >> trace_xfs_log_recover_item_reorder_tail(log, >> trans, item, pass); >> list_move_tail(&item->ri_list, &inode_list); >> @@ -3489,6 +3492,92 @@ xlog_recover_efd_pass2( >> return 0; >> } >> >> +STATIC int >> +xlog_recover_attri_pass2( >> + struct xlog *log, >> + struct xlog_recover_item *item, >> + xfs_lsn_t lsn) >> +{ >> + int error; >> + struct xfs_mount *mp = log->l_mp; >> + struct xfs_attri_log_item *attrip; >> + struct xfs_attr_log_format *attri_formatp; >> + >> + attri_formatp = item->ri_buf[0].i_addr; >> + >> + attrip = xfs_attri_init(mp); >> + error = xfs_attr_copy_format(&item->ri_buf[0], &attrip->format); >> + if (error) { >> + xfs_attri_item_free(attrip); >> + return error; >> + } >> + >> + spin_lock(&log->l_ailp->xa_lock); >> + /* >> + * The ATTRI has two references. One for the ATTRD and one for ATTRI to >> + * ensure it makes it into the AIL. Insert the ATTRI into the AIL >> + * directly and drop the ATTRI reference. Note that >> + * xfs_trans_ail_update() drops the AIL lock. >> + */ >> + xfs_trans_ail_update(log->l_ailp, &attrip->item, lsn); >> + xfs_attri_release(attrip); >> + return 0; >> +} >> + >> + >> +/* >> + * This routine is called when an ATTRD format structure is found in a committed >> + * transaction in the log. Its purpose is to cancel the corresponding ATTRI if >> + * it was still in the log. To do this it searches the AIL for the ATTRI with >> + * an id equal to that in the ATTRD format structure. If we find it we drop >> + * the ATTRD reference, which removes the ATTRI from the AIL and frees it. >> + */ >> +STATIC int >> +xlog_recover_attrd_pass2( >> + struct xlog *log, >> + struct xlog_recover_item *item) >> +{ >> + struct xfs_attr_log_format *attrd_formatp; >> + struct xfs_attri_log_item *attrip = NULL; >> + struct xfs_log_item *lip; >> + uint64_t attri_id; >> + struct xfs_ail_cursor cur; >> + struct xfs_ail *ailp = log->l_ailp; >> + >> + attrd_formatp = item->ri_buf[0].i_addr; >> + ASSERT((item->ri_buf[0].i_len == >> + (sizeof(struct xfs_attr_log_format)))); >> + attri_id = attrd_formatp->id; >> + >> + /* >> + * Search for the ATTRI with the id in the ATTRD format structure in the >> + * AIL. >> + */ >> + spin_lock(&ailp->xa_lock); >> + lip = xfs_trans_ail_cursor_first(ailp, &cur, 0); >> + while (lip != NULL) { >> + if (lip->li_type == XFS_LI_ATTRI) { >> + attrip = (struct xfs_attri_log_item *)lip; >> + if (attrip->format.id == attri_id) { >> + /* >> + * Drop the ATTRD reference to the ATTRI. This >> + * removes the ATTRI from the AIL and frees it. >> + */ >> + spin_unlock(&ailp->xa_lock); >> + xfs_attri_release(attrip); >> + spin_lock(&ailp->xa_lock); >> + break; >> + } >> + } >> + lip = xfs_trans_ail_cursor_next(ailp, &cur); >> + } >> + >> + xfs_trans_ail_cursor_done(&cur); >> + spin_unlock(&ailp->xa_lock); >> + >> + return 0; >> +} >> + >> /* >> * This routine is called to create an in-core extent rmap update >> * item from the rui format structure which was logged on disk. >> @@ -4108,6 +4197,10 @@ xlog_recover_commit_pass2( >> return xlog_recover_efi_pass2(log, item, trans->r_lsn); >> case XFS_LI_EFD: >> return xlog_recover_efd_pass2(log, item); >> + case XFS_LI_ATTRI: >> + return xlog_recover_attri_pass2(log, item, trans->r_lsn); >> + case XFS_LI_ATTRD: >> + return xlog_recover_attrd_pass2(log, item); >> case XFS_LI_RUI: >> return xlog_recover_rui_pass2(log, item, trans->r_lsn); >> case XFS_LI_RUD: >> @@ -4669,6 +4762,49 @@ xlog_recover_cancel_efi( >> spin_lock(&ailp->xa_lock); >> } >> >> +/* Recover the ATTRI if necessary. */ >> +STATIC int >> +xlog_recover_process_attri( >> + struct xfs_mount *mp, >> + struct xfs_ail *ailp, >> + struct xfs_log_item *lip) >> +{ >> + struct xfs_attri_log_item *attrip; >> + int error; >> + >> + /* >> + * Skip ATTRIs that we've already processed. >> + */ >> + attrip = container_of(lip, struct xfs_attri_log_item, item); >> + if (test_bit(XFS_ATTRI_RECOVERED, &attrip->flags)) >> + return 0; >> + >> + spin_unlock(&ailp->xa_lock); >> + error = xfs_attri_recover(mp, attrip); >> + spin_lock(&ailp->xa_lock); >> + >> + return error; >> +} >> + >> +/* Release the ATTRI since we're cancelling everything. */ >> +STATIC void >> +xlog_recover_cancel_attri( >> + struct xfs_mount *mp, >> + struct xfs_ail *ailp, >> + struct xfs_log_item *lip) >> +{ >> + struct xfs_attri_log_item *attrip; >> + >> + attrip = container_of(lip, struct xfs_attri_log_item, item); >> + >> + spin_unlock(&ailp->xa_lock); >> + xfs_attri_release(attrip); >> + spin_lock(&ailp->xa_lock); >> +} >> + >> + >> + >> + >> /* Recover the RUI if necessary. */ >> STATIC int >> xlog_recover_process_rui( >> @@ -4861,6 +4997,10 @@ xlog_recover_process_intents( >> case XFS_LI_EFI: >> error = xlog_recover_process_efi(log->l_mp, ailp, lip); >> break; >> + case XFS_LI_ATTRI: >> + error = xlog_recover_process_attri(log->l_mp, >> + ailp, lip); > FWIW you're allowed (in xfs land only) to use the double-indent > convention: > > error = xlog_recover_process_attri(log->l_mp, > ailp, lip); > > Instead of spending time lining things up with the '('. > Ok, from here out I'll use the double indent then >> + break; >> case XFS_LI_RUI: >> error = xlog_recover_process_rui(log->l_mp, ailp, lip); >> break; >> diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c >> index 584cf2d..046ced4 100644 >> --- a/fs/xfs/xfs_super.c >> +++ b/fs/xfs/xfs_super.c >> @@ -2024,6 +2024,7 @@ init_xfs_fs(void) >> xfs_rmap_update_init_defer_op(); >> xfs_refcount_update_init_defer_op(); >> xfs_bmap_update_init_defer_op(); >> + xfs_attr_init_defer_op(); >> >> xfs_dir_startup(); >> >> diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h >> index 815b53d2..d003637 100644 >> --- a/fs/xfs/xfs_trans.h >> +++ b/fs/xfs/xfs_trans.h >> @@ -40,6 +40,9 @@ struct xfs_cud_log_item; >> struct xfs_defer_ops; >> struct xfs_bui_log_item; >> struct xfs_bud_log_item; >> +struct xfs_attrd_log_item; >> +struct xfs_attri_log_item; >> + >> >> typedef struct xfs_log_item { >> struct list_head li_ail; /* AIL pointers */ >> @@ -223,12 +226,22 @@ void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *); >> void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint); >> >> void xfs_extent_free_init_defer_op(void); >> +void xfs_attr_init_defer_op(void); >> + >> struct xfs_efd_log_item *xfs_trans_get_efd(struct xfs_trans *, >> struct xfs_efi_log_item *, >> uint); >> int xfs_trans_free_extent(struct xfs_trans *, >> struct xfs_efd_log_item *, xfs_fsblock_t, >> xfs_extlen_t, struct xfs_owner_info *); >> +struct xfs_attrd_log_item * >> +xfs_trans_get_attrd(struct xfs_trans *tp, >> + struct xfs_attri_log_item *attrip); >> +int xfs_trans_attr(struct xfs_trans *tp, struct xfs_attrd_log_item *attrdp, >> + xfs_ino_t ino, uint32_t attr_op_flags, uint32_t flags, >> + uint32_t name_len, uint32_t value_len, >> + char *name, char *value); >> + >> int xfs_trans_commit(struct xfs_trans *); >> int xfs_trans_roll(struct xfs_trans **); >> int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *); >> diff --git a/fs/xfs/xfs_trans_attr.c b/fs/xfs/xfs_trans_attr.c >> new file mode 100644 >> index 0000000..39eb18d >> --- /dev/null >> +++ b/fs/xfs/xfs_trans_attr.c >> @@ -0,0 +1,286 @@ >> +/* >> + * Copyright (c) 2017, Oracle Inc. >> + * All Rights Reserved. >> + * >> + * This program is free software; you can redistribute it and/or >> + * modify it under the terms of the GNU General Public License as >> + * published by the Free Software Foundation. >> + * >> + * This program is distributed in the hope that it would be useful, >> + * but WITHOUT ANY WARRANTY; without even the implied warranty of >> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the >> + * GNU General Public License for more details. >> + * >> + * You should have received a copy of the GNU General Public License >> + * along with this program; if not, write the Free Software Foundation Inc. >> + */ >> +#include "xfs.h" >> +#include "xfs_fs.h" >> +#include "xfs_shared.h" >> +#include "xfs_format.h" >> +#include "xfs_log_format.h" >> +#include "xfs_trans_resv.h" >> +#include "xfs_bit.h" >> +#include "xfs_mount.h" >> +#include "xfs_defer.h" >> +#include "xfs_trans.h" >> +#include "xfs_trans_priv.h" >> +#include "xfs_attr_item.h" >> +#include "xfs_alloc.h" >> +#include "xfs_bmap.h" >> +#include "xfs_trace.h" >> +#include "libxfs/xfs_da_format.h" >> +#include "xfs_da_btree.h" >> +#include "xfs_attr.h" >> +#include "xfs_inode.h" >> +#include "xfs_icache.h" >> + >> +/* >> + * This routine is called to allocate an "extent free done" >> + * log item that will hold nextents worth of extents. The >> + * caller must use all nextents extents, because we are not >> + * flexible about this at all. >> + */ >> +struct xfs_attrd_log_item * >> +xfs_trans_get_attrd(struct xfs_trans *tp, >> + struct xfs_attri_log_item *attrip) >> +{ >> + struct xfs_attrd_log_item *attrdp; >> + >> + ASSERT(tp != NULL); >> + >> + attrdp = xfs_attrd_init(tp->t_mountp, attrip); >> + ASSERT(attrdp != NULL); >> + >> + /* >> + * Get a log_item_desc to point at the new item. >> + */ >> + xfs_trans_add_item(tp, &attrdp->item); >> + return attrdp; >> +} >> + >> +/* >> + * Delete an attr and log it to the ATTRD. Note that the transaction is marked >> + * dirty regardless of whether the attr delete succeeds or fails to support the >> + * ATTRI/ATTRD lifecycle rules. >> + */ >> +int >> +xfs_trans_attr( >> + struct xfs_trans *tp, >> + struct xfs_attrd_log_item *attrdp, >> + xfs_ino_t ino, >> + uint32_t op_flags, >> + uint32_t flags, >> + uint32_t name_len, >> + uint32_t value_len, >> + char *name, >> + char *value) >> +{ >> + uint next_attr; >> + struct xfs_attr_log_format *attrp; >> + int error; >> + int local; >> + struct xfs_da_args args; >> + struct xfs_inode *dp; >> + struct xfs_defer_ops dfops; >> + xfs_fsblock_t firstblock = NULLFSBLOCK; >> + struct xfs_mount *mp = tp->t_mountp; >> + >> + error = xfs_iget(mp, tp, ino, flags, 0, &dp); >> + if (error) >> + return error; >> + >> + ASSERT(XFS_IFORK_Q((dp))); >> + tp->t_flags |= XFS_TRANS_RESERVE; >> + >> + error = xfs_attr_args_init(&args, dp, name, flags); >> + if (error) >> + return error; >> + >> + args.name = name; >> + args.namelen = name_len; >> + args.hashval = xfs_da_hashname(args.name, args.namelen); >> + args.value = value; >> + args.valuelen = value_len; >> + args.dfops = &dfops; > dfops needs an xfs_defer_init(). > > Oh, the initialization of dfops is after where we start using it. > Please move it up (or the args.dfops assignment down). Good catch, will fix :-) >> + args.firstblock = &firstblock; >> + args.op_flags = XFS_DA_OP_OKNOENT; >> + args.total = xfs_attr_calc_size(&args, &local); >> + args.trans = tp; >> + ASSERT(local); >> + >> + xfs_ilock(dp, XFS_ILOCK_EXCL); >> + xfs_defer_init(args.dfops, args.firstblock); >> + >> + if (op_flags & ATTR_OP_FLAGS_SET) { > switch (op_flags & XFS_ATTR_OP_FLAGS_TYPE_MASK) { > case XFS_ATTR_OP_FLAGS_SET: > ... > case XFS_ATTR_OP_FLAGS_REMOVE: > ... > default: > ... > } Alrighty, will update >> + args.op_flags |= XFS_DA_OP_ADDNAME; >> + error = xfs_attr_set_args(&args, flags, false); >> + } else if (op_flags & ATTR_OP_FLAGS_REMOVE) { >> + error = xfs_attr_remove_args(&args, flags); >> + } else { >> + ASSERT(0); > We're reading and processing log items off the disk, so cleaning up and > returning -EFSCORRUPTED is more appropriate here. > Ok then, will fix >> + } >> + >> + if (error) >> + xfs_defer_cancel(&dfops); >> + >> + xfs_iunlock(dp, XFS_ILOCK_EXCL); >> + >> + /* >> + * Mark the transaction dirty, even on error. This ensures the >> + * transaction is aborted, which: >> + * >> + * 1.) releases the ATTRI and frees the ATTRD >> + * 2.) shuts down the filesystem >> + */ >> + tp->t_flags |= XFS_TRANS_DIRTY; >> + attrdp->item.li_desc->lid_flags |= XFS_LID_DIRTY; >> + >> + next_attr = attrdp->next_attr; >> + attrp = &(attrdp->format); >> + attrp->ino = ino; >> + attrp->op_flags = op_flags; >> + attrp->value_len = value_len; >> + attrp->name_len = name_len; >> + attrp->attr_flags = flags; >> + >> + attrdp->name = name; >> + attrdp->value = value; >> + attrdp->name_len = name_len; >> + attrdp->value_len = value_len; >> + attrdp->next_attr++; >> + >> + return error; >> +} >> + >> +static int >> +xfs_attr_diff_items( >> + void *priv, >> + struct list_head *a, >> + struct list_head *b) >> +{ >> + return 0; >> +} >> + >> +/* Get an ATTRI. */ >> +STATIC void * >> +xfs_attr_create_intent( >> + struct xfs_trans *tp, >> + unsigned int count) >> +{ >> + struct xfs_attri_log_item *attrip; >> + >> + ASSERT(tp != NULL); >> + ASSERT(count > 0); >> + >> + attrip = xfs_attri_init(tp->t_mountp); >> + ASSERT(attrip != NULL); >> + >> + /* >> + * Get a log_item_desc to point at the new item. >> + */ >> + xfs_trans_add_item(tp, &attrip->item); >> + return attrip; >> +} >> + >> +/* Log an attr to the intent item. */ >> +STATIC void >> +xfs_attr_log_item( >> + struct xfs_trans *tp, >> + void *intent, >> + struct list_head *item) >> +{ >> + struct xfs_attri_log_item *attrip = intent; >> + struct xfs_attr_item *free; >> + struct xfs_attr_log_format *attrp; >> + >> + free = container_of(item, struct xfs_attr_item, xattri_list); >> + >> + tp->t_flags |= XFS_TRANS_DIRTY; >> + attrip->item.li_desc->lid_flags |= XFS_LID_DIRTY; >> + >> + attrp = &attrip->format; >> + attrp->ino = free->xattri_ino; >> + attrp->op_flags = free->xattri_op_flags; >> + attrp->value_len = free->xattri_value_len; >> + attrp->name_len = free->xattri_name_len; >> + attrp->attr_flags = free->xattri_flags; >> + >> + attrip->name = &(free->xattri_name[0]); >> + attrip->value = &(free->xattri_value[0]); >> + attrip->name_len = free->xattri_name_len; >> + attrip->value_len = free->xattri_value_len; >> +} >> + >> +/* Get an ATTRD so we can process all the attrs. */ >> +STATIC void * >> +xfs_attr_create_done( >> + struct xfs_trans *tp, >> + void *intent, >> + unsigned int count) >> +{ >> + return xfs_trans_get_attrd(tp, intent); >> +} >> + >> +/* Process an attr. */ >> +STATIC int >> +xfs_attr_finish_item( >> + struct xfs_trans *tp, >> + struct xfs_defer_ops *dop, >> + struct list_head *item, >> + void *done_item, >> + void **state) >> +{ >> + struct xfs_attr_item *free; >> + int error; >> + >> + free = container_of(item, struct xfs_attr_item, xattri_list); >> + error = xfs_trans_attr(tp, done_item, >> + free->xattri_ino, >> + free->xattri_op_flags, >> + free->xattri_flags, >> + free->xattri_name_len, >> + free->xattri_value_len, >> + free->xattri_name, >> + free->xattri_value); >> + kmem_free(free); >> + return error; >> +} >> + >> +/* Abort all pending EFIs. */ > EFIs? > > --D I'll do a search for the EFI's and weed them out. Thank you!! :-) >> +STATIC void >> +xfs_attr_abort_intent( >> + void *intent) >> +{ >> + xfs_attri_release(intent); >> +} >> + >> +/* Cancel an attr */ >> +STATIC void >> +xfs_attr_cancel_item( >> + struct list_head *item) >> +{ >> + struct xfs_attr_item *free; >> + >> + free = container_of(item, struct xfs_attr_item, xattri_list); >> + kmem_free(free); >> +} >> + >> +static const struct xfs_defer_op_type xfs_attr_defer_type = { >> + .type = XFS_DEFER_OPS_TYPE_ATTR, >> + .max_items = XFS_ATTRI_MAX_FAST_ATTRS, >> + .diff_items = xfs_attr_diff_items, >> + .create_intent = xfs_attr_create_intent, >> + .abort_intent = xfs_attr_abort_intent, >> + .log_item = xfs_attr_log_item, >> + .create_done = xfs_attr_create_done, >> + .finish_item = xfs_attr_finish_item, >> + .cancel_item = xfs_attr_cancel_item, >> +}; >> + >> +/* Register the deferred op type. */ >> +void >> +xfs_attr_init_defer_op(void) >> +{ >> + xfs_defer_init_op_type(&xfs_attr_defer_type); >> +} >> -- >> 2.7.4 >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-xfs" in >> the body of a message tomajordomo@vger.kernel.org >> More majordomo info athttp://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile index a6e955b..ec6486b 100644 --- a/fs/xfs/Makefile +++ b/fs/xfs/Makefile @@ -106,6 +106,7 @@ xfs-y += xfs_log.o \ xfs_bmap_item.o \ xfs_buf_item.o \ xfs_extfree_item.o \ + xfs_attr_item.o \ xfs_icreate_item.o \ xfs_inode_item.o \ xfs_refcount_item.o \ @@ -115,6 +116,7 @@ xfs-y += xfs_log.o \ xfs_trans_bmap.o \ xfs_trans_buf.o \ xfs_trans_extfree.o \ + xfs_trans_attr.o \ xfs_trans_inode.o \ xfs_trans_refcount.o \ xfs_trans_rmap.o \ diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c index b00ec1f..5325ec2 100644 --- a/fs/xfs/libxfs/xfs_attr.c +++ b/fs/xfs/libxfs/xfs_attr.c @@ -74,7 +74,7 @@ STATIC int xfs_attr_fillstate(xfs_da_state_t *state); STATIC int xfs_attr_refillstate(xfs_da_state_t *state); -STATIC int +int xfs_attr_args_init( struct xfs_da_args *args, struct xfs_inode *dp, diff --git a/fs/xfs/libxfs/xfs_defer.h b/fs/xfs/libxfs/xfs_defer.h index d4f046d..ef0f8bf 100644 --- a/fs/xfs/libxfs/xfs_defer.h +++ b/fs/xfs/libxfs/xfs_defer.h @@ -55,6 +55,7 @@ enum xfs_defer_ops_type { XFS_DEFER_OPS_TYPE_REFCOUNT, XFS_DEFER_OPS_TYPE_RMAP, XFS_DEFER_OPS_TYPE_FREE, + XFS_DEFER_OPS_TYPE_ATTR, XFS_DEFER_OPS_TYPE_MAX, }; diff --git a/fs/xfs/libxfs/xfs_log_format.h b/fs/xfs/libxfs/xfs_log_format.h index 8372e9b..b0ce87e 100644 --- a/fs/xfs/libxfs/xfs_log_format.h +++ b/fs/xfs/libxfs/xfs_log_format.h @@ -18,6 +18,8 @@ #ifndef __XFS_LOG_FORMAT_H__ #define __XFS_LOG_FORMAT_H__ +#include "xfs_attr.h" + struct xfs_mount; struct xfs_trans_res; @@ -116,7 +118,12 @@ static inline uint xlog_get_cycle(char *ptr) #define XLOG_REG_TYPE_CUD_FORMAT 24 #define XLOG_REG_TYPE_BUI_FORMAT 25 #define XLOG_REG_TYPE_BUD_FORMAT 26 -#define XLOG_REG_TYPE_MAX 26 +#define XLOG_REG_TYPE_ATTRI_FORMAT 27 +#define XLOG_REG_TYPE_ATTRD_FORMAT 28 +#define XLOG_REG_TYPE_ATTR_NAME 29 +#define XLOG_REG_TYPE_ATTR_VALUE 30 +#define XLOG_REG_TYPE_MAX 31 + /* * Flags to log operation header @@ -239,6 +246,8 @@ typedef struct xfs_trans_header { #define XFS_LI_CUD 0x1243 #define XFS_LI_BUI 0x1244 /* bmbt update intent */ #define XFS_LI_BUD 0x1245 +#define XFS_LI_ATTRI 0x1246 /* attr set/remove intent*/ +#define XFS_LI_ATTRD 0x1247 /* attr set/remove done */ #define XFS_LI_TYPE_DESC \ { XFS_LI_EFI, "XFS_LI_EFI" }, \ @@ -254,7 +263,9 @@ typedef struct xfs_trans_header { { XFS_LI_CUI, "XFS_LI_CUI" }, \ { XFS_LI_CUD, "XFS_LI_CUD" }, \ { XFS_LI_BUI, "XFS_LI_BUI" }, \ - { XFS_LI_BUD, "XFS_LI_BUD" } + { XFS_LI_BUD, "XFS_LI_BUD" }, \ + { XFS_LI_ATTRI, "XFS_LI_ATTRI" }, \ + { XFS_LI_ATTRD, "XFS_LI_ATTRD" } /* * Inode Log Item Format definitions. @@ -863,4 +874,25 @@ struct xfs_icreate_log { __be32 icl_gen; /* inode generation number to use */ }; +/* Flags for deferred attribute operations */ +#define ATTR_OP_FLAGS_SET 0x01 /* Set the attribute */ +#define ATTR_OP_FLAGS_REMOVE 0x02 /* Remove the attribute */ +#define ATTR_OP_FLAGS_MAX 0x02 /* Max flags */ + +/* + * This is the structure used to lay out an attr log item in the + * log. + */ +struct xfs_attr_log_format { + uint64_t id; /* attri identifier */ + xfs_ino_t ino; /* the inode for this attr operation */ + uint32_t op_flags; /* marks the op as a set or remove */ + uint32_t name_len; /* attr name length */ + uint32_t value_len; /* attr value length */ + uint32_t attr_flags; /* attr flags */ + uint16_t type; /* attri log item type */ + uint16_t size; /* size of this item */ + uint32_t pad; /* pad to 64 bit aligned */ +}; + #endif /* __XFS_LOG_FORMAT_H__ */ diff --git a/fs/xfs/libxfs/xfs_types.h b/fs/xfs/libxfs/xfs_types.h index 0220159..5372063 100644 --- a/fs/xfs/libxfs/xfs_types.h +++ b/fs/xfs/libxfs/xfs_types.h @@ -23,6 +23,7 @@ typedef uint32_t prid_t; /* project ID */ typedef uint32_t xfs_agblock_t; /* blockno in alloc. group */ typedef uint32_t xfs_agino_t; /* inode # within allocation grp */ typedef uint32_t xfs_extlen_t; /* extent length in blocks */ +typedef uint32_t xfs_attrlen_t; /* attr length */ typedef uint32_t xfs_agnumber_t; /* allocation group number */ typedef int32_t xfs_extnum_t; /* # of extents in a file */ typedef int16_t xfs_aextnum_t; /* # extents in an attribute fork */ diff --git a/fs/xfs/xfs_attr.h b/fs/xfs/xfs_attr.h index 8542606..34bb4cb 100644 --- a/fs/xfs/xfs_attr.h +++ b/fs/xfs/xfs_attr.h @@ -18,6 +18,8 @@ #ifndef __XFS_ATTR_H__ #define __XFS_ATTR_H__ +#include "libxfs/xfs_defer.h" + struct xfs_inode; struct xfs_da_args; struct xfs_attr_list_context; @@ -87,6 +89,20 @@ typedef struct attrlist_ent { /* data from attr_list() */ } attrlist_ent_t; /* + * List of attrs to commit later. + */ +struct xfs_attr_item { + xfs_ino_t xattri_ino; + uint32_t xattri_op_flags; + uint32_t xattri_value_len; /* length of name and val */ + uint32_t xattri_name_len; /* length of name */ + uint32_t xattri_flags; /* attr flags */ + char xattri_name[XATTR_NAME_MAX]; + char xattri_value[XATTR_SIZE_MAX]; + struct list_head xattri_list; +}; + +/* * Given a pointer to the (char*) buffer containing the attr_list() result, * and an index, return a pointer to the indicated attribute in the buffer. */ @@ -154,6 +170,8 @@ int xfs_attr_remove(struct xfs_inode *dp, const unsigned char *name, int flags); int xfs_attr_remove_args(struct xfs_da_args *args, int flags); int xfs_attr_list(struct xfs_inode *dp, char *buffer, int bufsize, int flags, struct attrlist_cursor_kern *cursor); - +int xfs_attr_args_init(struct xfs_da_args *args, struct xfs_inode *dp, + const unsigned char *name, int flags); +int xfs_attr_calc_size(struct xfs_da_args *args, int *local); #endif /* __XFS_ATTR_H__ */ diff --git a/fs/xfs/xfs_attr_item.c b/fs/xfs/xfs_attr_item.c new file mode 100644 index 0000000..8cbe9b0 --- /dev/null +++ b/fs/xfs/xfs_attr_item.c @@ -0,0 +1,512 @@ +/* + * Copyright (c) 2017 Oracle, Inc. + * All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write the Free Software Foundation Inc. + */ +#include "xfs.h" +#include "xfs_fs.h" +#include "xfs_format.h" +#include "xfs_log_format.h" +#include "xfs_trans_resv.h" +#include "xfs_bit.h" +#include "xfs_mount.h" +#include "xfs_trans.h" +#include "xfs_trans_priv.h" +#include "xfs_buf_item.h" +#include "xfs_attr_item.h" +#include "xfs_log.h" +#include "xfs_btree.h" +#include "xfs_rmap.h" + + +static inline struct xfs_attri_log_item *ATTRI_ITEM(struct xfs_log_item *lip) +{ + return container_of(lip, struct xfs_attri_log_item, item); +} + +void +xfs_attri_item_free( + struct xfs_attri_log_item *attrip) +{ + kmem_free(attrip->item.li_lv_shadow); + kmem_free(attrip); +} + +/* + * This returns the number of iovecs needed to log the given attri item. + * We only need 1 iovec for an attri item. It just logs the attr_log_format + * structure. + */ +static inline int +xfs_attri_item_sizeof( + struct xfs_attri_log_item *attrip) +{ + return sizeof(struct xfs_attr_log_format); +} + +STATIC void +xfs_attri_item_size( + struct xfs_log_item *lip, + int *nvecs, + int *nbytes) +{ + struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip); + + *nvecs += 1; + *nbytes += xfs_attri_item_sizeof(attrip); + + if (attrip->name_len > 0) { + *nvecs += 1; + nbytes += attrip->name_len; + } + + if (attrip->value_len > 0) { + *nvecs += 1; + nbytes += attrip->value_len; + } +} + +/* + * This is called to fill in the vector of log iovecs for the + * given attri log item. We use only 1 iovec, and we point that + * at the attri_log_format structure embedded in the attri item. + * It is at this point that we assert that all of the attr + * slots in the attri item have been filled. + */ +STATIC void +xfs_attri_item_format( + struct xfs_log_item *lip, + struct xfs_log_vec *lv) +{ + struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip); + struct xfs_log_iovec *vecp = NULL; + + attrip->format.type = XFS_LI_ATTRI; + attrip->format.size = 1; + + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTRI_FORMAT, + &attrip->format, + xfs_attri_item_sizeof(attrip)); + if (attrip->name_len > 0) + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTR_NAME, + attrip->name, attrip->name_len); + + if (attrip->value_len > 0) + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTR_VALUE, + attrip->value, attrip->value_len); +} + + +/* + * Pinning has no meaning for an attri item, so just return. + */ +STATIC void +xfs_attri_item_pin( + struct xfs_log_item *lip) +{ +} + +/* + * The unpin operation is the last place an ATTRI is manipulated in the log. It + * is either inserted in the AIL or aborted in the event of a log I/O error. In + * either case, the EFI transaction has been successfully committed to make it + * this far. Therefore, we expect whoever committed the ATTRI to either + * construct and commit the ATTRD or drop the ATTRD's reference in the event of + * error. Simply drop the log's ATTRI reference now that the log is done with + * it. + */ +STATIC void +xfs_attri_item_unpin( + struct xfs_log_item *lip, + int remove) +{ + struct xfs_attri_log_item *attrip = ATTRI_ITEM(lip); + + xfs_attri_release(attrip); +} + +/* + * attri items have no locking or pushing. However, since ATTRIs are pulled + * from the AIL when their corresponding ATTRDs are committed to disk, their + * situation is very similar to being pinned. Return XFS_ITEM_PINNED so that + * the caller will eventually flush the log. This should help in getting the + * ATTRI out of the AIL. + */ +STATIC uint +xfs_attri_item_push( + struct xfs_log_item *lip, + struct list_head *buffer_list) +{ + return XFS_ITEM_PINNED; +} + +/* + * The ATTRI has been either committed or aborted if the transaction has been + * cancelled. If the transaction was cancelled, an ATTRD isn't going to be + * constructed and thus we free the ATTRI here directly. + */ +STATIC void +xfs_attri_item_unlock( + struct xfs_log_item *lip) +{ + if (lip->li_flags & XFS_LI_ABORTED) + xfs_attri_item_free(ATTRI_ITEM(lip)); +} + +/* + * The ATTRI is logged only once and cannot be moved in the log, so simply + * return the lsn at which it's been logged. + */ +STATIC xfs_lsn_t +xfs_attri_item_committed( + struct xfs_log_item *lip, + xfs_lsn_t lsn) +{ + return lsn; +} + +STATIC void +xfs_attri_item_committing( + struct xfs_log_item *lip, + xfs_lsn_t lsn) +{ +} + +/* + * This is the ops vector shared by all attri log items. + */ +static const struct xfs_item_ops xfs_attri_item_ops = { + .iop_size = xfs_attri_item_size, + .iop_format = xfs_attri_item_format, + .iop_pin = xfs_attri_item_pin, + .iop_unpin = xfs_attri_item_unpin, + .iop_unlock = xfs_attri_item_unlock, + .iop_committed = xfs_attri_item_committed, + .iop_push = xfs_attri_item_push, + .iop_committing = xfs_attri_item_committing +}; + + +/* + * Allocate and initialize an attri item + */ +struct xfs_attri_log_item * +xfs_attri_init( + struct xfs_mount *mp) + +{ + struct xfs_attri_log_item *attrip; + uint size; + + size = (uint)(sizeof(struct xfs_attri_log_item)); + attrip = kmem_zalloc(size, KM_SLEEP); + + xfs_log_item_init(mp, &(attrip->item), XFS_LI_ATTRI, + &xfs_attri_item_ops); + attrip->format.id = (uintptr_t)(void *)attrip; + atomic_set(&attrip->refcount, 2); + + return attrip; +} + +/* + * Copy an attr format buffer from the given buf, and into the destination + * attr format structure. + */ +int +xfs_attr_copy_format(struct xfs_log_iovec *buf, + struct xfs_attr_log_format *dst_attr_fmt) +{ + struct xfs_attr_log_format *src_attr_fmt = buf->i_addr; + uint len = sizeof(struct xfs_attr_log_format); + + if (buf->i_len == len) { + memcpy((char *)dst_attr_fmt, (char *)src_attr_fmt, len); + return 0; + } + return -EFSCORRUPTED; +} + +/* + * Freeing the attri requires that we remove it from the AIL if it has already + * been placed there. However, the ATTRI may not yet have been placed in the + * AIL when called by xfs_attri_release() from ATTRD processing due to the + * ordering of committed vs unpin operations in bulk insert operations. Hence + * the reference count to ensure only the last caller frees the ATTRI. + */ +void +xfs_attri_release( + struct xfs_attri_log_item *attrip) +{ + ASSERT(atomic_read(&attrip->refcount) > 0); + if (atomic_dec_and_test(&attrip->refcount)) { + xfs_trans_ail_remove(&attrip->item, + SHUTDOWN_LOG_IO_ERROR); + xfs_attri_item_free(attrip); + } +} + +static inline struct xfs_attrd_log_item *ATTRD_ITEM(struct xfs_log_item *lip) +{ + return container_of(lip, struct xfs_attrd_log_item, item); +} + +STATIC void +xfs_attrd_item_free(struct xfs_attrd_log_item *attrdp) +{ + kmem_free(attrdp->item.li_lv_shadow); + kmem_free(attrdp); +} + +/* + * This returns the number of iovecs needed to log the given attrd item. + * We only need 1 iovec for an attrd item. It just logs the attr_log_format + * structure. + */ +static inline int +xfs_attrd_item_sizeof( + struct xfs_attrd_log_item *attrdp) +{ + return sizeof(struct xfs_attr_log_format); +} + +STATIC void +xfs_attrd_item_size( + struct xfs_log_item *lip, + int *nvecs, + int *nbytes) +{ + struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip); + *nvecs += 1; + *nbytes += xfs_attrd_item_sizeof(attrdp); + + if (attrdp->name_len > 0) { + *nvecs += 1; + nbytes += attrdp->name_len; + } + + if (attrdp->value_len > 0) { + *nvecs += 1; + nbytes += attrdp->value_len; + } +} + +/* + * This is called to fill in the vector of log iovecs for the + * given attrd log item. We use only 1 iovec, and we point that + * at the attr_log_format structure embedded in the attrd item. + * It is at this point that we assert that all of the attr + * slots in the attrd item have been filled. + */ +STATIC void +xfs_attrd_item_format( + struct xfs_log_item *lip, + struct xfs_log_vec *lv) +{ + struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip); + struct xfs_log_iovec *vecp = NULL; + + attrdp->format.type = XFS_LI_ATTRD; + attrdp->format.size = 1; + + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTRD_FORMAT, + &attrdp->format, + xfs_attrd_item_sizeof(attrdp)); + + if (attrdp->name_len > 0) + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTR_NAME, + attrdp->name, attrdp->name_len); + + if (attrdp->value_len > 0) + xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_ATTR_VALUE, + attrdp->value, attrdp->value_len); +} + +/* + * Pinning has no meaning for an attrd item, so just return. + */ +STATIC void +xfs_attrd_item_pin( + struct xfs_log_item *lip) +{ +} + +/* + * Since pinning has no meaning for an attrd item, unpinning does + * not either. + */ +STATIC void +xfs_attrd_item_unpin( + struct xfs_log_item *lip, + int remove) +{ +} + +/* + * There isn't much you can do to push on an attrd item. It is simply stuck + * waiting for the log to be flushed to disk. + */ +STATIC uint +xfs_attrd_item_push( + struct xfs_log_item *lip, + struct list_head *buffer_list) +{ + return XFS_ITEM_PINNED; +} + +/* + * The ATTRD is either committed or aborted if the transaction is cancelled. If + * the transaction is cancelled, drop our reference to the ATTRI and free the + * ATTRD. + */ +STATIC void +xfs_attrd_item_unlock( + struct xfs_log_item *lip) +{ + struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip); + + if (lip->li_flags & XFS_LI_ABORTED) { + xfs_attri_release(attrdp->attrip); + xfs_attrd_item_free(attrdp); + } +} + +/* + * When the attrd item is committed to disk, all we need to do is delete our + * reference to our partner attri item and then free ourselves. Since we're + * freeing ourselves we must return -1 to keep the transaction code from + * further referencing this item. + */ +STATIC xfs_lsn_t +xfs_attrd_item_committed( + struct xfs_log_item *lip, + xfs_lsn_t lsn) +{ + struct xfs_attrd_log_item *attrdp = ATTRD_ITEM(lip); + + /* + * Drop the ATTRI reference regardless of whether the ATTRD has been + * aborted. Once the ATTRD transaction is constructed, it is the sole + * responsibility of the ATTRD to release the ATTRI (even if the ATTRI + * is aborted due to log I/O error). + */ + xfs_attri_release(attrdp->attrip); + xfs_attrd_item_free(attrdp); + + return (xfs_lsn_t)-1; +} + +STATIC void +xfs_attrd_item_committing( + struct xfs_log_item *lip, + xfs_lsn_t lsn) +{ +} + +/* + * This is the ops vector shared by all attrd log items. + */ +static const struct xfs_item_ops xfs_attrd_item_ops = { + .iop_size = xfs_attrd_item_size, + .iop_format = xfs_attrd_item_format, + .iop_pin = xfs_attrd_item_pin, + .iop_unpin = xfs_attrd_item_unpin, + .iop_unlock = xfs_attrd_item_unlock, + .iop_committed = xfs_attrd_item_committed, + .iop_push = xfs_attrd_item_push, + .iop_committing = xfs_attrd_item_committing +}; + +/* + * Allocate and initialize an attrd item + */ +struct xfs_attrd_log_item * +xfs_attrd_init( + struct xfs_mount *mp, + struct xfs_attri_log_item *attrip) + +{ + struct xfs_attrd_log_item *attrdp; + uint size; + + size = (uint)(sizeof(struct xfs_attrd_log_item)); + attrdp = kmem_zalloc(size, KM_SLEEP); + + xfs_log_item_init(mp, &attrdp->item, XFS_LI_ATTRD, + &xfs_attrd_item_ops); + attrdp->attrip = attrip; + attrdp->format.id = attrip->format.id; + + return attrdp; +} + +/* + * Process an attr intent item that was recovered from + * the log. We need to delete the attr that it describes. + */ +int +xfs_attri_recover( + struct xfs_mount *mp, + struct xfs_attri_log_item *attrip) +{ + struct xfs_attrd_log_item *attrdp; + struct xfs_trans *tp; + int error = 0; + struct xfs_attr_log_format *attrp; + + ASSERT(!test_bit(XFS_ATTRI_RECOVERED, &attrip->flags)); + + /* + * First check the validity of the attr described by the + * ATTRI. If any are bad, then assume that all are bad and + * just toss the ATTRI. + */ + attrp = &attrip->format; + if (attrp->value_len == 0 || + attrp->name_len == 0 || + attrp->op_flags > ATTR_OP_FLAGS_MAX) { + /* + * This will pull the ATTRI from the AIL and + * free the memory associated with it. + */ + set_bit(XFS_ATTRI_RECOVERED, &attrip->flags); + xfs_attri_release(attrip); + return -EIO; + } + + error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); + if (error) + return error; + attrdp = xfs_trans_get_attrd(tp, attrip); + attrp = &attrip->format; + + error = xfs_trans_attr(tp, attrdp, attrp->ino, + attrp->op_flags, + attrp->attr_flags, + attrp->name_len, + attrp->value_len, + attrip->name, + attrip->value); + if (error) + goto abort_error; + + + set_bit(XFS_ATTRI_RECOVERED, &attrip->flags); + error = xfs_trans_commit(tp); + return error; + +abort_error: + xfs_trans_cancel(tp); + return error; +} diff --git a/fs/xfs/xfs_attr_item.h b/fs/xfs/xfs_attr_item.h new file mode 100644 index 0000000..023675d --- /dev/null +++ b/fs/xfs/xfs_attr_item.h @@ -0,0 +1,111 @@ +/* + * Copyright (c) 2017 Oracle, Inc. + * All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write the Free Software Foundation Inc. + */ +#ifndef __XFS_ATTR_ITEM_H__ +#define __XFS_ATTR_ITEM_H__ + +/* kernel only ATTRI/ATTRD definitions */ + +struct xfs_mount; +struct kmem_zone; + +/* + * Max number of attrs in fast allocation path. + */ +#define XFS_ATTRI_MAX_FAST_ATTRS 16 + + +/* + * Define ATTR flag bits. Manipulated by set/clear/test_bit operators. + */ +#define XFS_ATTRI_RECOVERED 1 + +/* + * This is the "attr intention" log item. It is used to log the fact + * that some attrs need to be processed. It is used in conjunction with the + * "attr done" log item described below. + * + * The ATTRI is reference counted so that it is not freed prior to both the + * ATTRI and ATTRD being committed and unpinned. This ensures the ATTRI is + * inserted into the AIL even in the event of out of order ATTRI/ATTRD + * processing. In other words, an ATTRI is born with two references: + * + * 1.) an ATTRI held reference to track ATTRI AIL insertion + * 2.) an ATTRD held reference to track ATTRD commit + * + * On allocation, both references are the responsibility of the caller. Once + * the ATTRI is added to and dirtied in a transaction, ownership of reference + * one transfers to the transaction. The reference is dropped once the ATTRI is + * inserted to the AIL or in the event of failure along the way (e.g., commit + * failure, log I/O error, etc.). Note that the caller remains responsible for + * the ATTRD reference under all circumstances to this point. The caller has no + * means to detect failure once the transaction is committed, however. + * Therefore, an ATTRD is required after this point, even in the event of + * unrelated failure. + * + * Once an ATTRD is allocated and dirtied in a transaction, reference two + * transfers to the transaction. The ATTRD reference is dropped once it reaches + * the unpin handler. Similar to the ATTRI, the reference also drops in the + * event of commit failure or log I/O errors. Note that the ATTRD is not + * inserted in the AIL, so at this point both the ATTI and ATTRD are freed. + */ +struct xfs_attri_log_item { + xfs_log_item_t item; + atomic_t refcount; + unsigned long flags; /* misc flags */ + int name_len; + void *name; + int value_len; + void *value; + struct xfs_attr_log_format format; +}; + +/* + * This is the "attr done" log item. It is used to log + * the fact that some attrs earlier mentioned in an attri item + * have been freed. + */ +struct xfs_attrd_log_item { + struct xfs_log_item item; + struct xfs_attri_log_item *attrip; + uint next_attr; + int name_len; + void *name; + int value_len; + void *value; + struct xfs_attr_log_format format; +}; + +/* + * Max number of attrs in fast allocation path. + */ +#define XFS_ATTRD_MAX_FAST_ATTRS 16 + +extern struct kmem_zone *xfs_attri_zone; +extern struct kmem_zone *xfs_attrd_zone; + +struct xfs_attri_log_item *xfs_attri_init(struct xfs_mount *mp); +struct xfs_attrd_log_item *xfs_attrd_init(struct xfs_mount *mp, + struct xfs_attri_log_item *attrip); +int xfs_attr_copy_format(struct xfs_log_iovec *buf, + struct xfs_attr_log_format *dst_attri_fmt); +void xfs_attri_item_free(struct xfs_attri_log_item *attrip); +void xfs_attri_release(struct xfs_attri_log_item *attrip); + +int xfs_attri_recover(struct xfs_mount *mp, + struct xfs_attri_log_item *attrip); + +#endif /* __XFS_ATTR_ITEM_H__ */ diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index ee34899..8326f56 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -33,6 +33,7 @@ #include "xfs_log_recover.h" #include "xfs_inode_item.h" #include "xfs_extfree_item.h" +#include "xfs_attr_item.h" #include "xfs_trans_priv.h" #include "xfs_alloc.h" #include "xfs_ialloc.h" @@ -1956,6 +1957,8 @@ xlog_recover_reorder_trans( case XFS_LI_CUD: case XFS_LI_BUI: case XFS_LI_BUD: + case XFS_LI_ATTRI: + case XFS_LI_ATTRD: trace_xfs_log_recover_item_reorder_tail(log, trans, item, pass); list_move_tail(&item->ri_list, &inode_list); @@ -3489,6 +3492,92 @@ xlog_recover_efd_pass2( return 0; } +STATIC int +xlog_recover_attri_pass2( + struct xlog *log, + struct xlog_recover_item *item, + xfs_lsn_t lsn) +{ + int error; + struct xfs_mount *mp = log->l_mp; + struct xfs_attri_log_item *attrip; + struct xfs_attr_log_format *attri_formatp; + + attri_formatp = item->ri_buf[0].i_addr; + + attrip = xfs_attri_init(mp); + error = xfs_attr_copy_format(&item->ri_buf[0], &attrip->format); + if (error) { + xfs_attri_item_free(attrip); + return error; + } + + spin_lock(&log->l_ailp->xa_lock); + /* + * The ATTRI has two references. One for the ATTRD and one for ATTRI to + * ensure it makes it into the AIL. Insert the ATTRI into the AIL + * directly and drop the ATTRI reference. Note that + * xfs_trans_ail_update() drops the AIL lock. + */ + xfs_trans_ail_update(log->l_ailp, &attrip->item, lsn); + xfs_attri_release(attrip); + return 0; +} + + +/* + * This routine is called when an ATTRD format structure is found in a committed + * transaction in the log. Its purpose is to cancel the corresponding ATTRI if + * it was still in the log. To do this it searches the AIL for the ATTRI with + * an id equal to that in the ATTRD format structure. If we find it we drop + * the ATTRD reference, which removes the ATTRI from the AIL and frees it. + */ +STATIC int +xlog_recover_attrd_pass2( + struct xlog *log, + struct xlog_recover_item *item) +{ + struct xfs_attr_log_format *attrd_formatp; + struct xfs_attri_log_item *attrip = NULL; + struct xfs_log_item *lip; + uint64_t attri_id; + struct xfs_ail_cursor cur; + struct xfs_ail *ailp = log->l_ailp; + + attrd_formatp = item->ri_buf[0].i_addr; + ASSERT((item->ri_buf[0].i_len == + (sizeof(struct xfs_attr_log_format)))); + attri_id = attrd_formatp->id; + + /* + * Search for the ATTRI with the id in the ATTRD format structure in the + * AIL. + */ + spin_lock(&ailp->xa_lock); + lip = xfs_trans_ail_cursor_first(ailp, &cur, 0); + while (lip != NULL) { + if (lip->li_type == XFS_LI_ATTRI) { + attrip = (struct xfs_attri_log_item *)lip; + if (attrip->format.id == attri_id) { + /* + * Drop the ATTRD reference to the ATTRI. This + * removes the ATTRI from the AIL and frees it. + */ + spin_unlock(&ailp->xa_lock); + xfs_attri_release(attrip); + spin_lock(&ailp->xa_lock); + break; + } + } + lip = xfs_trans_ail_cursor_next(ailp, &cur); + } + + xfs_trans_ail_cursor_done(&cur); + spin_unlock(&ailp->xa_lock); + + return 0; +} + /* * This routine is called to create an in-core extent rmap update * item from the rui format structure which was logged on disk. @@ -4108,6 +4197,10 @@ xlog_recover_commit_pass2( return xlog_recover_efi_pass2(log, item, trans->r_lsn); case XFS_LI_EFD: return xlog_recover_efd_pass2(log, item); + case XFS_LI_ATTRI: + return xlog_recover_attri_pass2(log, item, trans->r_lsn); + case XFS_LI_ATTRD: + return xlog_recover_attrd_pass2(log, item); case XFS_LI_RUI: return xlog_recover_rui_pass2(log, item, trans->r_lsn); case XFS_LI_RUD: @@ -4669,6 +4762,49 @@ xlog_recover_cancel_efi( spin_lock(&ailp->xa_lock); } +/* Recover the ATTRI if necessary. */ +STATIC int +xlog_recover_process_attri( + struct xfs_mount *mp, + struct xfs_ail *ailp, + struct xfs_log_item *lip) +{ + struct xfs_attri_log_item *attrip; + int error; + + /* + * Skip ATTRIs that we've already processed. + */ + attrip = container_of(lip, struct xfs_attri_log_item, item); + if (test_bit(XFS_ATTRI_RECOVERED, &attrip->flags)) + return 0; + + spin_unlock(&ailp->xa_lock); + error = xfs_attri_recover(mp, attrip); + spin_lock(&ailp->xa_lock); + + return error; +} + +/* Release the ATTRI since we're cancelling everything. */ +STATIC void +xlog_recover_cancel_attri( + struct xfs_mount *mp, + struct xfs_ail *ailp, + struct xfs_log_item *lip) +{ + struct xfs_attri_log_item *attrip; + + attrip = container_of(lip, struct xfs_attri_log_item, item); + + spin_unlock(&ailp->xa_lock); + xfs_attri_release(attrip); + spin_lock(&ailp->xa_lock); +} + + + + /* Recover the RUI if necessary. */ STATIC int xlog_recover_process_rui( @@ -4861,6 +4997,10 @@ xlog_recover_process_intents( case XFS_LI_EFI: error = xlog_recover_process_efi(log->l_mp, ailp, lip); break; + case XFS_LI_ATTRI: + error = xlog_recover_process_attri(log->l_mp, + ailp, lip); + break; case XFS_LI_RUI: error = xlog_recover_process_rui(log->l_mp, ailp, lip); break; diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index 584cf2d..046ced4 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -2024,6 +2024,7 @@ init_xfs_fs(void) xfs_rmap_update_init_defer_op(); xfs_refcount_update_init_defer_op(); xfs_bmap_update_init_defer_op(); + xfs_attr_init_defer_op(); xfs_dir_startup(); diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h index 815b53d2..d003637 100644 --- a/fs/xfs/xfs_trans.h +++ b/fs/xfs/xfs_trans.h @@ -40,6 +40,9 @@ struct xfs_cud_log_item; struct xfs_defer_ops; struct xfs_bui_log_item; struct xfs_bud_log_item; +struct xfs_attrd_log_item; +struct xfs_attri_log_item; + typedef struct xfs_log_item { struct list_head li_ail; /* AIL pointers */ @@ -223,12 +226,22 @@ void xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *); void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint); void xfs_extent_free_init_defer_op(void); +void xfs_attr_init_defer_op(void); + struct xfs_efd_log_item *xfs_trans_get_efd(struct xfs_trans *, struct xfs_efi_log_item *, uint); int xfs_trans_free_extent(struct xfs_trans *, struct xfs_efd_log_item *, xfs_fsblock_t, xfs_extlen_t, struct xfs_owner_info *); +struct xfs_attrd_log_item * +xfs_trans_get_attrd(struct xfs_trans *tp, + struct xfs_attri_log_item *attrip); +int xfs_trans_attr(struct xfs_trans *tp, struct xfs_attrd_log_item *attrdp, + xfs_ino_t ino, uint32_t attr_op_flags, uint32_t flags, + uint32_t name_len, uint32_t value_len, + char *name, char *value); + int xfs_trans_commit(struct xfs_trans *); int xfs_trans_roll(struct xfs_trans **); int xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *); diff --git a/fs/xfs/xfs_trans_attr.c b/fs/xfs/xfs_trans_attr.c new file mode 100644 index 0000000..39eb18d --- /dev/null +++ b/fs/xfs/xfs_trans_attr.c @@ -0,0 +1,286 @@ +/* + * Copyright (c) 2017, Oracle Inc. + * All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write the Free Software Foundation Inc. + */ +#include "xfs.h" +#include "xfs_fs.h" +#include "xfs_shared.h" +#include "xfs_format.h" +#include "xfs_log_format.h" +#include "xfs_trans_resv.h" +#include "xfs_bit.h" +#include "xfs_mount.h" +#include "xfs_defer.h" +#include "xfs_trans.h" +#include "xfs_trans_priv.h" +#include "xfs_attr_item.h" +#include "xfs_alloc.h" +#include "xfs_bmap.h" +#include "xfs_trace.h" +#include "libxfs/xfs_da_format.h" +#include "xfs_da_btree.h" +#include "xfs_attr.h" +#include "xfs_inode.h" +#include "xfs_icache.h" + +/* + * This routine is called to allocate an "extent free done" + * log item that will hold nextents worth of extents. The + * caller must use all nextents extents, because we are not + * flexible about this at all. + */ +struct xfs_attrd_log_item * +xfs_trans_get_attrd(struct xfs_trans *tp, + struct xfs_attri_log_item *attrip) +{ + struct xfs_attrd_log_item *attrdp; + + ASSERT(tp != NULL); + + attrdp = xfs_attrd_init(tp->t_mountp, attrip); + ASSERT(attrdp != NULL); + + /* + * Get a log_item_desc to point at the new item. + */ + xfs_trans_add_item(tp, &attrdp->item); + return attrdp; +} + +/* + * Delete an attr and log it to the ATTRD. Note that the transaction is marked + * dirty regardless of whether the attr delete succeeds or fails to support the + * ATTRI/ATTRD lifecycle rules. + */ +int +xfs_trans_attr( + struct xfs_trans *tp, + struct xfs_attrd_log_item *attrdp, + xfs_ino_t ino, + uint32_t op_flags, + uint32_t flags, + uint32_t name_len, + uint32_t value_len, + char *name, + char *value) +{ + uint next_attr; + struct xfs_attr_log_format *attrp; + int error; + int local; + struct xfs_da_args args; + struct xfs_inode *dp; + struct xfs_defer_ops dfops; + xfs_fsblock_t firstblock = NULLFSBLOCK; + struct xfs_mount *mp = tp->t_mountp; + + error = xfs_iget(mp, tp, ino, flags, 0, &dp); + if (error) + return error; + + ASSERT(XFS_IFORK_Q((dp))); + tp->t_flags |= XFS_TRANS_RESERVE; + + error = xfs_attr_args_init(&args, dp, name, flags); + if (error) + return error; + + args.name = name; + args.namelen = name_len; + args.hashval = xfs_da_hashname(args.name, args.namelen); + args.value = value; + args.valuelen = value_len; + args.dfops = &dfops; + args.firstblock = &firstblock; + args.op_flags = XFS_DA_OP_OKNOENT; + args.total = xfs_attr_calc_size(&args, &local); + args.trans = tp; + ASSERT(local); + + xfs_ilock(dp, XFS_ILOCK_EXCL); + xfs_defer_init(args.dfops, args.firstblock); + + if (op_flags & ATTR_OP_FLAGS_SET) { + args.op_flags |= XFS_DA_OP_ADDNAME; + error = xfs_attr_set_args(&args, flags, false); + } else if (op_flags & ATTR_OP_FLAGS_REMOVE) { + error = xfs_attr_remove_args(&args, flags); + } else { + ASSERT(0); + } + + if (error) + xfs_defer_cancel(&dfops); + + xfs_iunlock(dp, XFS_ILOCK_EXCL); + + /* + * Mark the transaction dirty, even on error. This ensures the + * transaction is aborted, which: + * + * 1.) releases the ATTRI and frees the ATTRD + * 2.) shuts down the filesystem + */ + tp->t_flags |= XFS_TRANS_DIRTY; + attrdp->item.li_desc->lid_flags |= XFS_LID_DIRTY; + + next_attr = attrdp->next_attr; + attrp = &(attrdp->format); + attrp->ino = ino; + attrp->op_flags = op_flags; + attrp->value_len = value_len; + attrp->name_len = name_len; + attrp->attr_flags = flags; + + attrdp->name = name; + attrdp->value = value; + attrdp->name_len = name_len; + attrdp->value_len = value_len; + attrdp->next_attr++; + + return error; +} + +static int +xfs_attr_diff_items( + void *priv, + struct list_head *a, + struct list_head *b) +{ + return 0; +} + +/* Get an ATTRI. */ +STATIC void * +xfs_attr_create_intent( + struct xfs_trans *tp, + unsigned int count) +{ + struct xfs_attri_log_item *attrip; + + ASSERT(tp != NULL); + ASSERT(count > 0); + + attrip = xfs_attri_init(tp->t_mountp); + ASSERT(attrip != NULL); + + /* + * Get a log_item_desc to point at the new item. + */ + xfs_trans_add_item(tp, &attrip->item); + return attrip; +} + +/* Log an attr to the intent item. */ +STATIC void +xfs_attr_log_item( + struct xfs_trans *tp, + void *intent, + struct list_head *item) +{ + struct xfs_attri_log_item *attrip = intent; + struct xfs_attr_item *free; + struct xfs_attr_log_format *attrp; + + free = container_of(item, struct xfs_attr_item, xattri_list); + + tp->t_flags |= XFS_TRANS_DIRTY; + attrip->item.li_desc->lid_flags |= XFS_LID_DIRTY; + + attrp = &attrip->format; + attrp->ino = free->xattri_ino; + attrp->op_flags = free->xattri_op_flags; + attrp->value_len = free->xattri_value_len; + attrp->name_len = free->xattri_name_len; + attrp->attr_flags = free->xattri_flags; + + attrip->name = &(free->xattri_name[0]); + attrip->value = &(free->xattri_value[0]); + attrip->name_len = free->xattri_name_len; + attrip->value_len = free->xattri_value_len; +} + +/* Get an ATTRD so we can process all the attrs. */ +STATIC void * +xfs_attr_create_done( + struct xfs_trans *tp, + void *intent, + unsigned int count) +{ + return xfs_trans_get_attrd(tp, intent); +} + +/* Process an attr. */ +STATIC int +xfs_attr_finish_item( + struct xfs_trans *tp, + struct xfs_defer_ops *dop, + struct list_head *item, + void *done_item, + void **state) +{ + struct xfs_attr_item *free; + int error; + + free = container_of(item, struct xfs_attr_item, xattri_list); + error = xfs_trans_attr(tp, done_item, + free->xattri_ino, + free->xattri_op_flags, + free->xattri_flags, + free->xattri_name_len, + free->xattri_value_len, + free->xattri_name, + free->xattri_value); + kmem_free(free); + return error; +} + +/* Abort all pending EFIs. */ +STATIC void +xfs_attr_abort_intent( + void *intent) +{ + xfs_attri_release(intent); +} + +/* Cancel an attr */ +STATIC void +xfs_attr_cancel_item( + struct list_head *item) +{ + struct xfs_attr_item *free; + + free = container_of(item, struct xfs_attr_item, xattri_list); + kmem_free(free); +} + +static const struct xfs_defer_op_type xfs_attr_defer_type = { + .type = XFS_DEFER_OPS_TYPE_ATTR, + .max_items = XFS_ATTRI_MAX_FAST_ATTRS, + .diff_items = xfs_attr_diff_items, + .create_intent = xfs_attr_create_intent, + .abort_intent = xfs_attr_abort_intent, + .log_item = xfs_attr_log_item, + .create_done = xfs_attr_create_done, + .finish_item = xfs_attr_finish_item, + .cancel_item = xfs_attr_cancel_item, +}; + +/* Register the deferred op type. */ +void +xfs_attr_init_defer_op(void) +{ + xfs_defer_init_op_type(&xfs_attr_defer_type); +}
This patch adds two new log item types for setting or removing attributes as deferred operations. The xfs_attri_log_item logs an intent to set or remove an attribute. The corresponding xfs_attrd_log_item holds a reference to the xfs_attri_log_item and is freed once the transaction is done. Both log items use a generic xfs_attr_log_format structure that contains the attribute name, value, flags, inode, and an op_flag that indicates if the operations is a set or remove. At the moment, this feature will only be used by the parent pointer patch set which uses attributes to store information about an inodes parent. Signed-off-by: Allison Henderson <allison.henderson@oracle.com> --- fs/xfs/Makefile | 2 + fs/xfs/libxfs/xfs_attr.c | 2 +- fs/xfs/libxfs/xfs_defer.h | 1 + fs/xfs/libxfs/xfs_log_format.h | 36 ++- fs/xfs/libxfs/xfs_types.h | 1 + fs/xfs/xfs_attr.h | 20 +- fs/xfs/xfs_attr_item.c | 512 +++++++++++++++++++++++++++++++++++++++++ fs/xfs/xfs_attr_item.h | 111 +++++++++ fs/xfs/xfs_log_recover.c | 140 +++++++++++ fs/xfs/xfs_super.c | 1 + fs/xfs/xfs_trans.h | 13 ++ fs/xfs/xfs_trans_attr.c | 286 +++++++++++++++++++++++ 12 files changed, 1121 insertions(+), 4 deletions(-)