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Tue, 07 May 2024 17:57:38 -0700 (PDT) Date: Tue, 7 May 2024 17:57:03 -0700 Mime-Version: 1.0 X-Mailer: git-send-email 2.45.0.rc1.225.g2a3ae87e7f-goog Message-ID: <20240508005704.765813-1-drosen@google.com> To: linux-f2fs-devel@lists.sourceforge.net X-Headers-End: 1s4W3J-0000LR-3s Subject: [f2fs-dev] [PATCH 1/2] dump.f2fs: Add ability to dump folders X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Daniel Rosenberg via Linux-f2fs-devel From: Daniel Rosenberg Reply-To: Daniel Rosenberg Cc: Jaegeuk Kim , kernel-team@android.com, Daniel Rosenberg Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net This adds the ability to dump folders as well as files. Folders are dumped recursively. Additionally, dumped files/folders may be directed to a folder specified by -o [path] instead of ./lost_found. The -r flag will dump the entire fs from the root inode. -f or -y will skip the prompt before dumping, and -P will preserve the mode/owner info for the created file/folder. Signed-off-by: Daniel Rosenberg --- fsck/dump.c | 164 +++++++++++++++++++++++++++++++++++++----------- fsck/fsck.c | 4 +- fsck/fsck.h | 4 +- fsck/main.c | 24 ++++++- man/dump.f2fs.8 | 17 ++++- 5 files changed, 171 insertions(+), 42 deletions(-) base-commit: 5da4e5241503b385e4a7e75b1b2bb3367b38be96 diff --git a/fsck/dump.c b/fsck/dump.c index b2e990b..f60f6f9 100644 --- a/fsck/dump.c +++ b/fsck/dump.c @@ -247,7 +247,26 @@ out: printf("\n"); } -static void dump_data_blk(struct f2fs_sb_info *sbi, __u64 offset, u32 blkaddr) +static void dump_folder_contents(struct f2fs_sb_info *sbi, u8 *bitmap, + struct f2fs_dir_entry *dentry, + __u8 (*filenames)[F2FS_SLOT_LEN], int max) +{ + int i; + int name_len; + + for (i = 0; i < max; i++) { + if (test_bit_le(i, bitmap) == 0) + continue; + name_len = le16_to_cpu(dentry[i].name_len); + if (name_len == 1 && filenames[i][0] == '.') + continue; + if (name_len == 2 && filenames[i][0] == '.' && filenames[i][1] == '.') + continue; + dump_node(sbi, le32_to_cpu(dentry[i].ino), 1, NULL, 0, 1); + } +} + +static void dump_data_blk(struct f2fs_sb_info *sbi, __u64 offset, u32 blkaddr, bool is_folder) { char buf[F2FS_BLKSIZE]; @@ -288,12 +307,19 @@ static void dump_data_blk(struct f2fs_sb_info *sbi, __u64 offset, u32 blkaddr) ASSERT(ret >= 0); } - /* write blkaddr */ - dev_write_dump(buf, offset, F2FS_BLKSIZE); + if (is_folder) { + struct f2fs_dentry_block *d = (struct f2fs_dentry_block *) buf; + + dump_folder_contents(sbi, d->dentry_bitmap, F2FS_DENTRY_BLOCK_DENTRIES(d), + F2FS_DENTRY_BLOCK_FILENAMES(d), NR_DENTRY_IN_BLOCK); + } else { + /* write blkaddr */ + dev_write_dump(buf, offset, F2FS_BLKSIZE); + } } static void dump_node_blk(struct f2fs_sb_info *sbi, int ntype, - u32 nid, u32 addr_per_block, u64 *ofs) + u32 nid, u32 addr_per_block, u64 *ofs, int is_dir) { struct node_info ni; struct f2fs_node *node_blk; @@ -330,20 +356,20 @@ static void dump_node_blk(struct f2fs_sb_info *sbi, int ntype, switch (ntype) { case TYPE_DIRECT_NODE: dump_data_blk(sbi, *ofs * F2FS_BLKSIZE, - le32_to_cpu(node_blk->dn.addr[i])); + le32_to_cpu(node_blk->dn.addr[i]), is_dir); (*ofs)++; break; case TYPE_INDIRECT_NODE: dump_node_blk(sbi, TYPE_DIRECT_NODE, le32_to_cpu(node_blk->in.nid[i]), addr_per_block, - ofs); + ofs, is_dir); break; case TYPE_DOUBLE_INDIRECT_NODE: dump_node_blk(sbi, TYPE_INDIRECT_NODE, le32_to_cpu(node_blk->in.nid[i]), addr_per_block, - ofs); + ofs, is_dir); break; } } @@ -435,8 +461,9 @@ static int dump_inode_blk(struct f2fs_sb_info *sbi, u32 nid, u32 i = 0; u64 ofs = 0; u32 addr_per_block; + bool is_dir = S_ISDIR(le16_to_cpu(node_blk->i.i_mode)); - if((node_blk->i.i_inline & F2FS_INLINE_DATA)) { + if ((node_blk->i.i_inline & F2FS_INLINE_DATA)) { DBG(3, "ino[0x%x] has inline data!\n", nid); /* recover from inline data */ dev_write_dump(((unsigned char *)node_blk) + INLINE_DATA_OFFSET, @@ -444,13 +471,25 @@ static int dump_inode_blk(struct f2fs_sb_info *sbi, u32 nid, return -1; } + if ((node_blk->i.i_inline & F2FS_INLINE_DENTRY)) { + void *inline_dentry = inline_data_addr(node_blk); + struct f2fs_dentry_ptr d; + + make_dentry_ptr(&d, node_blk, inline_dentry, 2); + + DBG(3, "ino[0x%x] has inline dentries!\n", nid); + /* recover from inline dentry */ + dump_folder_contents(sbi, d.bitmap, d.dentry, d.filename, d.max); + return -1; + } + c.show_file_map_max_offset = f2fs_max_file_offset(&node_blk->i); addr_per_block = ADDRS_PER_BLOCK(&node_blk->i); /* check data blocks in inode */ for (i = 0; i < ADDRS_PER_INODE(&node_blk->i); i++, ofs++) dump_data_blk(sbi, ofs * F2FS_BLKSIZE, le32_to_cpu( - node_blk->i.i_addr[get_extra_isize(node_blk) + i])); + node_blk->i.i_addr[get_extra_isize(node_blk) + i]), is_dir); /* check node blocks in inode */ for (i = 0; i < 5; i++) { @@ -458,17 +497,20 @@ static int dump_inode_blk(struct f2fs_sb_info *sbi, u32 nid, dump_node_blk(sbi, TYPE_DIRECT_NODE, le32_to_cpu(F2FS_INODE_I_NID(&node_blk->i, i)), addr_per_block, - &ofs); + &ofs, + is_dir); else if (i == 2 || i == 3) dump_node_blk(sbi, TYPE_INDIRECT_NODE, le32_to_cpu(F2FS_INODE_I_NID(&node_blk->i, i)), addr_per_block, - &ofs); + &ofs, + is_dir); else if (i == 4) dump_node_blk(sbi, TYPE_DOUBLE_INDIRECT_NODE, le32_to_cpu(F2FS_INODE_I_NID(&node_blk->i, i)), addr_per_block, - &ofs); + &ofs, + is_dir); else ASSERT(0); } @@ -479,8 +521,44 @@ static int dump_inode_blk(struct f2fs_sb_info *sbi, u32 nid, return 0; } -static int dump_file(struct f2fs_sb_info *sbi, struct node_info *ni, - struct f2fs_node *node_blk, int force) +static void dump_file(struct f2fs_sb_info *sbi, struct node_info *ni, + struct f2fs_node *node_blk, char *path) +{ + struct f2fs_inode *inode = &node_blk->i; + int ret; + + c.dump_fd = open(path, O_TRUNC|O_CREAT|O_RDWR, 0666); + ASSERT(c.dump_fd >= 0); + + /* dump file's data */ + dump_inode_blk(sbi, ni->ino, node_blk); + + /* adjust file size */ + ret = ftruncate(c.dump_fd, le32_to_cpu(inode->i_size)); + ASSERT(ret >= 0); + + close(c.dump_fd); +} + +static void dump_folder(struct f2fs_sb_info *sbi, struct node_info *ni, + struct f2fs_node *node_blk, char *path, int is_root) +{ + if (!is_root) { + if (mkdir(path, 0777) < 0 && errno != EEXIST) { + MSG(0, "Failed to create directory %s\n", path); + return; + } + ASSERT(chdir(path) == 0); + } + /* dump folder data */ + dump_inode_blk(sbi, ni->ino, node_blk); + if (!is_root) + ASSERT(chdir("..") == 0); +} + +static int dump_filesystem(struct f2fs_sb_info *sbi, struct node_info *ni, + struct f2fs_node *node_blk, int force, char *base_path, + bool is_base, bool allow_folder) { struct f2fs_inode *inode = &node_blk->i; u32 imode = le16_to_cpu(inode->i_mode); @@ -489,6 +567,7 @@ static int dump_file(struct f2fs_sb_info *sbi, struct node_info *ni, char path[1024] = {0}; char ans[255] = {0}; int is_encrypted = file_is_encrypt(inode); + int is_root = sbi->root_ino_num == ni->nid; int ret; if (is_encrypted) { @@ -496,11 +575,15 @@ static int dump_file(struct f2fs_sb_info *sbi, struct node_info *ni, return -1; } - if ((!S_ISREG(imode) && !S_ISLNK(imode)) || - namelen == 0 || namelen > F2FS_NAME_LEN) { - MSG(force, "Not a regular file or wrong name info\n\n"); + if ((!S_ISREG(imode) && !S_ISLNK(imode) && !(S_ISDIR(imode) && allow_folder))) { + MSG(force, "Not a regular file\n\n"); return -1; } + if (!is_root && (namelen == 0 || namelen > F2FS_NAME_LEN)) { + MSG(force, "Wrong name info\n\n"); + return -1; + } + base_path = base_path ?: "./lost_found"; if (force) goto dump; @@ -508,31 +591,42 @@ static int dump_file(struct f2fs_sb_info *sbi, struct node_info *ni, if (c.show_file_map) return dump_inode_blk(sbi, ni->ino, node_blk); - printf("Do you want to dump this file into ./lost_found/? [Y/N] "); + printf("Do you want to dump this %s into %s/? [Y/N] ", + S_ISREG(imode) || S_ISLNK(imode) ? "file" : "folder", + base_path); ret = scanf("%s", ans); ASSERT(ret >= 0); if (!strcasecmp(ans, "y")) { dump: - ret = system("mkdir -p ./lost_found"); - ASSERT(ret >= 0); + if (is_base) { + getcwd(path, sizeof(path)); + ret = mkdir(base_path, 0777); + ASSERT(ret == 0 || errno == EEXIST); + ASSERT(chdir(base_path) == 0); + } /* make a file */ - strncpy(name, (const char *)inode->i_name, namelen); - name[namelen] = 0; - sprintf(path, "./lost_found/%s", name); - - c.dump_fd = open(path, O_TRUNC|O_CREAT|O_RDWR, 0666); - ASSERT(c.dump_fd >= 0); - - /* dump file's data */ - dump_inode_blk(sbi, ni->ino, node_blk); + if (!is_root) { + strncpy(name, (const char *)inode->i_name, namelen); + name[namelen] = 0; + } - /* adjust file size */ - ret = ftruncate(c.dump_fd, le32_to_cpu(inode->i_size)); - ASSERT(ret >= 0); + if (S_ISREG(imode) || S_ISLNK(imode)) { + dump_file(sbi, ni, node_blk, name); + } else { + dump_folder(sbi, ni, node_blk, name, is_root); + } - close(c.dump_fd); + /* fix up mode/owner */ + if (c.preserve_perms) { + if (is_root) + strncpy(name, ".", 2); + chmod(name, imode); + chown(name, inode->i_uid, inode->i_gid); + } + if (is_base) + chdir(path); } return 0; } @@ -582,7 +676,7 @@ void dump_node_scan_disk(struct f2fs_sb_info *sbi, nid_t nid) free(node_blk); } -int dump_node(struct f2fs_sb_info *sbi, nid_t nid, int force) +int dump_node(struct f2fs_sb_info *sbi, nid_t nid, int force, char *base_path, int base, int allow_folder) { struct node_info ni; struct f2fs_node *node_blk; @@ -617,7 +711,7 @@ int dump_node(struct f2fs_sb_info *sbi, nid_t nid, int force) print_node_info(sbi, node_blk, force); if (ni.ino == ni.nid) - ret = dump_file(sbi, &ni, node_blk, force); + ret = dump_filesystem(sbi, &ni, node_blk, force, base_path, base, allow_folder); } else { print_node_info(sbi, node_blk, force); MSG(force, "Invalid (i)node block\n\n"); diff --git a/fsck/fsck.c b/fsck/fsck.c index 5d345d0..7400dcf 100644 --- a/fsck/fsck.c +++ b/fsck/fsck.c @@ -1651,7 +1651,7 @@ static void print_dentry(struct f2fs_sb_info *sbi, __u8 *name, d = d->next; } printf("/%s", new); - if (dump_node(sbi, le32_to_cpu(dentry[idx].ino), 0)) + if (dump_node(sbi, le32_to_cpu(dentry[idx].ino), 0, NULL, 0, 0)) printf("\33[2K\r"); } else { for (i = 1; i < depth; i++) @@ -3632,7 +3632,7 @@ int fsck_verify(struct f2fs_sb_info *sbi) if (!strcasecmp(ans, "y")) { for (i = 0; i < fsck->nr_nat_entries; i++) { if (f2fs_test_bit(i, fsck->nat_area_bitmap)) - dump_node(sbi, i, 1); + dump_node(sbi, i, 1, NULL, 1, 0); } } } diff --git a/fsck/fsck.h b/fsck/fsck.h index f5282e2..6cac926 100644 --- a/fsck/fsck.h +++ b/fsck/fsck.h @@ -270,12 +270,14 @@ struct dump_option { int end_ssa; int32_t blk_addr; nid_t scan_nid; + int use_root_nid; + char *base_path; }; extern void nat_dump(struct f2fs_sb_info *, nid_t, nid_t); extern void sit_dump(struct f2fs_sb_info *, unsigned int, unsigned int); extern void ssa_dump(struct f2fs_sb_info *, int, int); -extern int dump_node(struct f2fs_sb_info *, nid_t, int); +extern int dump_node(struct f2fs_sb_info *, nid_t, int, char *, int, int); extern int dump_info_from_blkaddr(struct f2fs_sb_info *, u32); extern unsigned int start_bidx_of_node(unsigned int, struct f2fs_node *); extern void dump_node_scan_disk(struct f2fs_sb_info *sbi, nid_t nid); diff --git a/fsck/main.c b/fsck/main.c index c4d0956..7d0578a 100644 --- a/fsck/main.c +++ b/fsck/main.c @@ -34,7 +34,7 @@ struct f2fs_fsck gfsck; INIT_FEATURE_TABLE; -#ifdef WITH_SLOAD +#if defined(WITH_SLOAD) || defined(WITH_DUMP) static char *absolute_path(const char *file) { char *ret; @@ -384,7 +384,7 @@ void f2fs_parse_options(int argc, char *argv[]) } } else if (!strcmp("dump.f2fs", prog)) { #ifdef WITH_DUMP - const char *option_string = "d:i:I:n:Ms:Sa:b:V"; + const char *option_string = "d:fi:I:n:Mo:Prs:Sa:b:Vy"; static struct dump_option dump_opt = { .nid = 0, /* default root ino */ .start_nat = -1, @@ -395,6 +395,8 @@ void f2fs_parse_options(int argc, char *argv[]) .end_ssa = -1, .blk_addr = -1, .scan_nid = 0, + .use_root_nid = 0, + .base_path = NULL, }; c.func = DUMP; @@ -456,6 +458,19 @@ void f2fs_parse_options(int argc, char *argv[]) ret = sscanf(optarg, "%x", &dump_opt.blk_addr); break; + case 'y': + case 'f': + c.force = 1; + break; + case 'r': + dump_opt.use_root_nid = 1; + break; + case 'o': + dump_opt.base_path = absolute_path(optarg); + break; + case 'P': + c.preserve_perms = 1; + break; case 'V': show_version(prog); exit(0); @@ -914,6 +929,9 @@ static void do_dump(struct f2fs_sb_info *sbi) struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); u32 flag = le32_to_cpu(ckpt->ckpt_flags); + if (opt->use_root_nid) + opt->nid = sbi->root_ino_num; + if (opt->end_nat == -1) opt->end_nat = NM_I(sbi)->max_nid; if (opt->end_sit == -1) @@ -929,7 +947,7 @@ static void do_dump(struct f2fs_sb_info *sbi) if (opt->blk_addr != -1) dump_info_from_blkaddr(sbi, opt->blk_addr); if (opt->nid) - dump_node(sbi, opt->nid, 0); + dump_node(sbi, opt->nid, c.force, opt->base_path, 1, 1); if (opt->scan_nid) dump_node_scan_disk(sbi, opt->scan_nid); diff --git a/man/dump.f2fs.8 b/man/dump.f2fs.8 index 94bf5f3..60d6783 100644 --- a/man/dump.f2fs.8 +++ b/man/dump.f2fs.8 @@ -44,7 +44,8 @@ is used to retrieve f2fs metadata (usually in a disk partition). \fIdevice\fP is the special file corresponding to the device (e.g. \fI/dev/sdXX\fP). -Currently, it can retrieve 1) a file given its inode number, 2) NAT +Currently, it can retrieve 1) a file or folder given its inode number +(folders are dumped recursively), 2) NAT entries into a file, 3) SIT entries into a file, 4) SSA entries into a file, 5) reverse information from the given block address. .PP @@ -56,6 +57,20 @@ is 0 on success and -1 on failure. .BI \-i " inode number" Specify an inode number to dump out. .TP +.BI \-r +Dump out from the root inode. +.TP +.BI \-f +Do not prompt before dumping +.TP +.BI \-y +Alias for \-f +.TP +.BI \-o " path" +Dump inodes to the given path +.BI \-P +Preserve mode/owner/group for dumped inode +.TP .BI \-I " inode number" Specify an inode number and scan full disk to dump out, include history inode block .TP