Message ID | 155916888978.758159.5450955030930365488.stgit@magnolia (mailing list archive) |
---|---|
State | Superseded |
Headers | show |
Series | xfs: introduce new BULKSTAT and INUMBERS ioctls | expand |
On 5/29/19 3:28 PM, Darrick J. Wong wrote: > From: Darrick J. Wong <darrick.wong@oracle.com> > > Wire up the V5 BULKSTAT_SINGLE ioctl and rename the old one V1. > > Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> > --- > fs/xfs/libxfs/xfs_fs.h | 16 +++++++++ > fs/xfs/xfs_ioctl.c | 85 ++++++++++++++++++++++++++++++++++++++++++++++++ > fs/xfs/xfs_ioctl32.c | 1 + > fs/xfs/xfs_ondisk.h | 1 + > 4 files changed, 103 insertions(+) > > > diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h > index 960f3542e207..95d0411dae9b 100644 > --- a/fs/xfs/libxfs/xfs_fs.h > +++ b/fs/xfs/libxfs/xfs_fs.h > @@ -468,6 +468,16 @@ struct xfs_bulk_ireq { > > #define XFS_BULK_IREQ_FLAGS_ALL (0) > > +/* Header for a single inode request. */ > +struct xfs_ireq { > + uint64_t ino; /* I/O: start with this inode */ > + uint32_t flags; /* I/O: operation flags */ > + uint32_t reserved32; /* must be zero */ > + uint64_t reserved[2]; /* must be zero */ > +}; > + > +#define XFS_IREQ_FLAGS_ALL (0) > + > /* > * ioctl structures for v5 bulkstat and inumbers requests > */ > @@ -478,6 +488,11 @@ struct xfs_bulkstat_req { > #define XFS_BULKSTAT_REQ_SIZE(nr) (sizeof(struct xfs_bulkstat_req) + \ > (nr) * sizeof(struct xfs_bulkstat)) > > +struct xfs_bulkstat_single_req { > + struct xfs_ireq hdr; > + struct xfs_bulkstat bulkstat; > +}; > + > /* > * Error injection. > */ > @@ -780,6 +795,7 @@ struct xfs_scrub_metadata { > #define XFS_IOC_GOINGDOWN _IOR ('X', 125, uint32_t) > #define XFS_IOC_FSGEOMETRY _IOR ('X', 126, struct xfs_fsop_geom) > #define XFS_IOC_BULKSTAT _IOR ('X', 127, struct xfs_bulkstat_req) > +#define XFS_IOC_BULKSTAT_SINGLE _IOR ('X', 128, struct xfs_bulkstat_single_req) > /* XFS_IOC_GETFSUUID ---------- deprecated 140 */ > > > diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c > index f6724c75ba97..f6971eb9561e 100644 > --- a/fs/xfs/xfs_ioctl.c > +++ b/fs/xfs/xfs_ioctl.c > @@ -923,6 +923,89 @@ xfs_ioc_bulkstat( > return 0; > } > > +/* > + * Check the incoming singleton request @hdr from userspace and initialize the > + * internal @breq bulk request appropriately. Returns 0 if the bulk request > + * should proceed; or the usual negative error code. > + */ > +static int > +xfs_ireq_setup( > + struct xfs_mount *mp, > + struct xfs_ireq *hdr, > + struct xfs_ibulk *breq, > + void __user *ubuffer) > +{ > + if ((hdr->flags & ~XFS_IREQ_FLAGS_ALL) || > + hdr->reserved32 || > + memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved))) > + return -EINVAL; > + > + if (XFS_INO_TO_AGNO(mp, hdr->ino) >= mp->m_sb.sb_agcount) > + return -EINVAL; > + > + breq->ubuffer = ubuffer; > + breq->icount = 1; > + breq->startino = hdr->ino; > + return 0; > +} > + > +/* > + * Update the userspace singleton request @hdr to reflect the end state of the > + * internal bulk request @breq. If @error is negative then we return just > + * that; otherwise we copy the state so that userspace can discover what > + * happened. > + */ > +static int > +xfs_ireq_teardown( > + struct xfs_ireq *hdr, > + struct xfs_ibulk *breq, > + int error) > +{ > + if (error < 0) > + return error; Similar nit about the error code here too. This function is so small, it might make sense to just factor it up into the calling function, sense I don't see it used else where in the set. I suppose it's good to keep things consistent too though, it seem to be the pattern that the other ioctls use. I think the rest is ok though Allison > + > + hdr->ino = breq->startino; > + return 0; > +} > + > +/* Handle the v5 bulkstat_single ioctl. */ > +STATIC int > +xfs_ioc_bulkstat_single( > + struct xfs_mount *mp, > + unsigned int cmd, > + struct xfs_bulkstat_single_req __user *arg) > +{ > + struct xfs_ireq hdr; > + struct xfs_ibulk breq = { > + .mp = mp, > + }; > + int error; > + > + if (!capable(CAP_SYS_ADMIN)) > + return -EPERM; > + > + if (XFS_FORCED_SHUTDOWN(mp)) > + return -EIO; > + > + if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr))) > + return -EFAULT; > + > + error = xfs_ireq_setup(mp, &hdr, &breq, &arg->bulkstat); > + if (error) > + return error; > + > + error = xfs_bulkstat_one(&breq, xfs_bulkstat_fmt); > + > + error = xfs_ireq_teardown(&hdr, &breq, error); > + if (error) > + return error; > + > + if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr))) > + return -EFAULT; > + > + return 0; > +} > + > STATIC int > xfs_ioc_fsgeometry( > struct xfs_mount *mp, > @@ -2089,6 +2172,8 @@ xfs_file_ioctl( > > case XFS_IOC_BULKSTAT: > return xfs_ioc_bulkstat(mp, cmd, arg); > + case XFS_IOC_BULKSTAT_SINGLE: > + return xfs_ioc_bulkstat_single(mp, cmd, arg); > > case XFS_IOC_FSGEOMETRY_V1: > return xfs_ioc_fsgeometry(mp, arg, 3); > diff --git a/fs/xfs/xfs_ioctl32.c b/fs/xfs/xfs_ioctl32.c > index 84c342be4536..08a90e3459d1 100644 > --- a/fs/xfs/xfs_ioctl32.c > +++ b/fs/xfs/xfs_ioctl32.c > @@ -577,6 +577,7 @@ xfs_file_compat_ioctl( > case FS_IOC_GETFSMAP: > case XFS_IOC_SCRUB_METADATA: > case XFS_IOC_BULKSTAT: > + case XFS_IOC_BULKSTAT_SINGLE: > return xfs_file_ioctl(filp, cmd, p); > #if !defined(BROKEN_X86_ALIGNMENT) || defined(CONFIG_X86_X32) > /* > diff --git a/fs/xfs/xfs_ondisk.h b/fs/xfs/xfs_ondisk.h > index 954484c6eb96..fa1252657b08 100644 > --- a/fs/xfs/xfs_ondisk.h > +++ b/fs/xfs/xfs_ondisk.h > @@ -150,6 +150,7 @@ xfs_check_ondisk_structs(void) > XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat, 192); > XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers, 24); > XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_req, 64); > + XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_single_req, 224); > } > > #endif /* __XFS_ONDISK_H */ >
diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h index 960f3542e207..95d0411dae9b 100644 --- a/fs/xfs/libxfs/xfs_fs.h +++ b/fs/xfs/libxfs/xfs_fs.h @@ -468,6 +468,16 @@ struct xfs_bulk_ireq { #define XFS_BULK_IREQ_FLAGS_ALL (0) +/* Header for a single inode request. */ +struct xfs_ireq { + uint64_t ino; /* I/O: start with this inode */ + uint32_t flags; /* I/O: operation flags */ + uint32_t reserved32; /* must be zero */ + uint64_t reserved[2]; /* must be zero */ +}; + +#define XFS_IREQ_FLAGS_ALL (0) + /* * ioctl structures for v5 bulkstat and inumbers requests */ @@ -478,6 +488,11 @@ struct xfs_bulkstat_req { #define XFS_BULKSTAT_REQ_SIZE(nr) (sizeof(struct xfs_bulkstat_req) + \ (nr) * sizeof(struct xfs_bulkstat)) +struct xfs_bulkstat_single_req { + struct xfs_ireq hdr; + struct xfs_bulkstat bulkstat; +}; + /* * Error injection. */ @@ -780,6 +795,7 @@ struct xfs_scrub_metadata { #define XFS_IOC_GOINGDOWN _IOR ('X', 125, uint32_t) #define XFS_IOC_FSGEOMETRY _IOR ('X', 126, struct xfs_fsop_geom) #define XFS_IOC_BULKSTAT _IOR ('X', 127, struct xfs_bulkstat_req) +#define XFS_IOC_BULKSTAT_SINGLE _IOR ('X', 128, struct xfs_bulkstat_single_req) /* XFS_IOC_GETFSUUID ---------- deprecated 140 */ diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index f6724c75ba97..f6971eb9561e 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -923,6 +923,89 @@ xfs_ioc_bulkstat( return 0; } +/* + * Check the incoming singleton request @hdr from userspace and initialize the + * internal @breq bulk request appropriately. Returns 0 if the bulk request + * should proceed; or the usual negative error code. + */ +static int +xfs_ireq_setup( + struct xfs_mount *mp, + struct xfs_ireq *hdr, + struct xfs_ibulk *breq, + void __user *ubuffer) +{ + if ((hdr->flags & ~XFS_IREQ_FLAGS_ALL) || + hdr->reserved32 || + memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved))) + return -EINVAL; + + if (XFS_INO_TO_AGNO(mp, hdr->ino) >= mp->m_sb.sb_agcount) + return -EINVAL; + + breq->ubuffer = ubuffer; + breq->icount = 1; + breq->startino = hdr->ino; + return 0; +} + +/* + * Update the userspace singleton request @hdr to reflect the end state of the + * internal bulk request @breq. If @error is negative then we return just + * that; otherwise we copy the state so that userspace can discover what + * happened. + */ +static int +xfs_ireq_teardown( + struct xfs_ireq *hdr, + struct xfs_ibulk *breq, + int error) +{ + if (error < 0) + return error; + + hdr->ino = breq->startino; + return 0; +} + +/* Handle the v5 bulkstat_single ioctl. */ +STATIC int +xfs_ioc_bulkstat_single( + struct xfs_mount *mp, + unsigned int cmd, + struct xfs_bulkstat_single_req __user *arg) +{ + struct xfs_ireq hdr; + struct xfs_ibulk breq = { + .mp = mp, + }; + int error; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + if (XFS_FORCED_SHUTDOWN(mp)) + return -EIO; + + if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr))) + return -EFAULT; + + error = xfs_ireq_setup(mp, &hdr, &breq, &arg->bulkstat); + if (error) + return error; + + error = xfs_bulkstat_one(&breq, xfs_bulkstat_fmt); + + error = xfs_ireq_teardown(&hdr, &breq, error); + if (error) + return error; + + if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr))) + return -EFAULT; + + return 0; +} + STATIC int xfs_ioc_fsgeometry( struct xfs_mount *mp, @@ -2089,6 +2172,8 @@ xfs_file_ioctl( case XFS_IOC_BULKSTAT: return xfs_ioc_bulkstat(mp, cmd, arg); + case XFS_IOC_BULKSTAT_SINGLE: + return xfs_ioc_bulkstat_single(mp, cmd, arg); case XFS_IOC_FSGEOMETRY_V1: return xfs_ioc_fsgeometry(mp, arg, 3); diff --git a/fs/xfs/xfs_ioctl32.c b/fs/xfs/xfs_ioctl32.c index 84c342be4536..08a90e3459d1 100644 --- a/fs/xfs/xfs_ioctl32.c +++ b/fs/xfs/xfs_ioctl32.c @@ -577,6 +577,7 @@ xfs_file_compat_ioctl( case FS_IOC_GETFSMAP: case XFS_IOC_SCRUB_METADATA: case XFS_IOC_BULKSTAT: + case XFS_IOC_BULKSTAT_SINGLE: return xfs_file_ioctl(filp, cmd, p); #if !defined(BROKEN_X86_ALIGNMENT) || defined(CONFIG_X86_X32) /* diff --git a/fs/xfs/xfs_ondisk.h b/fs/xfs/xfs_ondisk.h index 954484c6eb96..fa1252657b08 100644 --- a/fs/xfs/xfs_ondisk.h +++ b/fs/xfs/xfs_ondisk.h @@ -150,6 +150,7 @@ xfs_check_ondisk_structs(void) XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat, 192); XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers, 24); XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_req, 64); + XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_single_req, 224); } #endif /* __XFS_ONDISK_H */