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author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-02 09:28:37 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-02 09:28:37 -0700 |
commit | 63580e51bb3e7ec459501165884e5f815a7a9322 (patch) | |
tree | 2130de984dda95996bc7922734feb465a13fca70 /fs/jfs/jfs_dtree.c | |
parent | 7747bd4bceb3079572695d3942294a6c7b265557 (diff) | |
parent | ac6614b76478e68173ccf7ad4e9e98035cc9c21d (diff) | |
download | linux-stable-63580e51bb3e7ec459501165884e5f815a7a9322.tar.gz linux-stable-63580e51bb3e7ec459501165884e5f815a7a9322.tar.bz2 linux-stable-63580e51bb3e7ec459501165884e5f815a7a9322.zip |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull VFS patches (part 1) from Al Viro:
"The major change in this pile is ->readdir() replacement with
->iterate(), dealing with ->f_pos races in ->readdir() instances for
good.
There's a lot more, but I'd prefer to split the pull request into
several stages and this is the first obvious cutoff point."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (67 commits)
[readdir] constify ->actor
[readdir] ->readdir() is gone
[readdir] convert ecryptfs
[readdir] convert coda
[readdir] convert ocfs2
[readdir] convert fatfs
[readdir] convert xfs
[readdir] convert btrfs
[readdir] convert hostfs
[readdir] convert afs
[readdir] convert ncpfs
[readdir] convert hfsplus
[readdir] convert hfs
[readdir] convert befs
[readdir] convert cifs
[readdir] convert freevxfs
[readdir] convert fuse
[readdir] convert hpfs
reiserfs: switch reiserfs_readdir_dentry to inode
reiserfs: is_privroot_deh() needs only directory inode, actually
...
Diffstat (limited to 'fs/jfs/jfs_dtree.c')
-rw-r--r-- | fs/jfs/jfs_dtree.c | 63 |
1 files changed, 29 insertions, 34 deletions
diff --git a/fs/jfs/jfs_dtree.c b/fs/jfs/jfs_dtree.c index 0ddbeceafc62..9f4ed13d9f15 100644 --- a/fs/jfs/jfs_dtree.c +++ b/fs/jfs/jfs_dtree.c @@ -3002,9 +3002,9 @@ static inline struct jfs_dirent *next_jfs_dirent(struct jfs_dirent *dirent) * return: offset = (pn, index) of start entry * of next jfs_readdir()/dtRead() */ -int jfs_readdir(struct file *filp, void *dirent, filldir_t filldir) +int jfs_readdir(struct file *file, struct dir_context *ctx) { - struct inode *ip = file_inode(filp); + struct inode *ip = file_inode(file); struct nls_table *codepage = JFS_SBI(ip->i_sb)->nls_tab; int rc = 0; loff_t dtpos; /* legacy OS/2 style position */ @@ -3033,7 +3033,7 @@ int jfs_readdir(struct file *filp, void *dirent, filldir_t filldir) int overflow, fix_page, page_fixed = 0; static int unique_pos = 2; /* If we can't fix broken index */ - if (filp->f_pos == DIREND) + if (ctx->pos == DIREND) return 0; if (DO_INDEX(ip)) { @@ -3045,7 +3045,7 @@ int jfs_readdir(struct file *filp, void *dirent, filldir_t filldir) */ do_index = 1; - dir_index = (u32) filp->f_pos; + dir_index = (u32) ctx->pos; if (dir_index > 1) { struct dir_table_slot dirtab_slot; @@ -3053,25 +3053,25 @@ int jfs_readdir(struct file *filp, void *dirent, filldir_t filldir) if (dtEmpty(ip) || (dir_index >= JFS_IP(ip)->next_index)) { /* Stale position. Directory has shrunk */ - filp->f_pos = DIREND; + ctx->pos = DIREND; return 0; } repeat: rc = read_index(ip, dir_index, &dirtab_slot); if (rc) { - filp->f_pos = DIREND; + ctx->pos = DIREND; return rc; } if (dirtab_slot.flag == DIR_INDEX_FREE) { if (loop_count++ > JFS_IP(ip)->next_index) { jfs_err("jfs_readdir detected " "infinite loop!"); - filp->f_pos = DIREND; + ctx->pos = DIREND; return 0; } dir_index = le32_to_cpu(dirtab_slot.addr2); if (dir_index == -1) { - filp->f_pos = DIREND; + ctx->pos = DIREND; return 0; } goto repeat; @@ -3080,13 +3080,13 @@ int jfs_readdir(struct file *filp, void *dirent, filldir_t filldir) index = dirtab_slot.slot; DT_GETPAGE(ip, bn, mp, PSIZE, p, rc); if (rc) { - filp->f_pos = DIREND; + ctx->pos = DIREND; return 0; } if (p->header.flag & BT_INTERNAL) { jfs_err("jfs_readdir: bad index table"); DT_PUTPAGE(mp); - filp->f_pos = -1; + ctx->pos = -1; return 0; } } else { @@ -3094,23 +3094,22 @@ int jfs_readdir(struct file *filp, void *dirent, filldir_t filldir) /* * self "." */ - filp->f_pos = 0; - if (filldir(dirent, ".", 1, 0, ip->i_ino, - DT_DIR)) + ctx->pos = 0; + if (!dir_emit(ctx, ".", 1, ip->i_ino, DT_DIR)) return 0; } /* * parent ".." */ - filp->f_pos = 1; - if (filldir(dirent, "..", 2, 1, PARENT(ip), DT_DIR)) + ctx->pos = 1; + if (!dir_emit(ctx, "..", 2, PARENT(ip), DT_DIR)) return 0; /* * Find first entry of left-most leaf */ if (dtEmpty(ip)) { - filp->f_pos = DIREND; + ctx->pos = DIREND; return 0; } @@ -3128,23 +3127,19 @@ int jfs_readdir(struct file *filp, void *dirent, filldir_t filldir) * pn > 0: Real entries, pn=1 -> leftmost page * pn = index = -1: No more entries */ - dtpos = filp->f_pos; + dtpos = ctx->pos; if (dtpos == 0) { /* build "." entry */ - - if (filldir(dirent, ".", 1, filp->f_pos, ip->i_ino, - DT_DIR)) + if (!dir_emit(ctx, ".", 1, ip->i_ino, DT_DIR)) return 0; dtoffset->index = 1; - filp->f_pos = dtpos; + ctx->pos = dtpos; } if (dtoffset->pn == 0) { if (dtoffset->index == 1) { /* build ".." entry */ - - if (filldir(dirent, "..", 2, filp->f_pos, - PARENT(ip), DT_DIR)) + if (!dir_emit(ctx, "..", 2, PARENT(ip), DT_DIR)) return 0; } else { jfs_err("jfs_readdir called with " @@ -3152,18 +3147,18 @@ int jfs_readdir(struct file *filp, void *dirent, filldir_t filldir) } dtoffset->pn = 1; dtoffset->index = 0; - filp->f_pos = dtpos; + ctx->pos = dtpos; } if (dtEmpty(ip)) { - filp->f_pos = DIREND; + ctx->pos = DIREND; return 0; } - if ((rc = dtReadNext(ip, &filp->f_pos, &btstack))) { + if ((rc = dtReadNext(ip, &ctx->pos, &btstack))) { jfs_err("jfs_readdir: unexpected rc = %d " "from dtReadNext", rc); - filp->f_pos = DIREND; + ctx->pos = DIREND; return 0; } /* get start leaf page and index */ @@ -3171,7 +3166,7 @@ int jfs_readdir(struct file *filp, void *dirent, filldir_t filldir) /* offset beyond directory eof ? */ if (bn < 0) { - filp->f_pos = DIREND; + ctx->pos = DIREND; return 0; } } @@ -3180,7 +3175,7 @@ int jfs_readdir(struct file *filp, void *dirent, filldir_t filldir) if (dirent_buf == 0) { DT_PUTPAGE(mp); jfs_warn("jfs_readdir: __get_free_page failed!"); - filp->f_pos = DIREND; + ctx->pos = DIREND; return -ENOMEM; } @@ -3295,9 +3290,9 @@ skip_one: jfs_dirent = (struct jfs_dirent *) dirent_buf; while (jfs_dirents--) { - filp->f_pos = jfs_dirent->position; - if (filldir(dirent, jfs_dirent->name, - jfs_dirent->name_len, filp->f_pos, + ctx->pos = jfs_dirent->position; + if (!dir_emit(ctx, jfs_dirent->name, + jfs_dirent->name_len, jfs_dirent->ino, DT_UNKNOWN)) goto out; jfs_dirent = next_jfs_dirent(jfs_dirent); @@ -3309,7 +3304,7 @@ skip_one: } if (!overflow && (bn == 0)) { - filp->f_pos = DIREND; + ctx->pos = DIREND; break; } |