diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-02 09:28:37 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-02 09:28:37 -0700 |
commit | 63580e51bb3e7ec459501165884e5f815a7a9322 (patch) | |
tree | 2130de984dda95996bc7922734feb465a13fca70 /fs/efs/dir.c | |
parent | 7747bd4bceb3079572695d3942294a6c7b265557 (diff) | |
parent | ac6614b76478e68173ccf7ad4e9e98035cc9c21d (diff) | |
download | linux-63580e51bb3e7ec459501165884e5f815a7a9322.tar.gz |
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/efs/dir.c')
-rw-r--r-- | fs/efs/dir.c | 75 |
1 files changed, 33 insertions, 42 deletions
diff --git a/fs/efs/dir.c b/fs/efs/dir.c index 055a9e9ca747..b72307ccdf7a 100644 --- a/fs/efs/dir.c +++ b/fs/efs/dir.c @@ -7,40 +7,38 @@ #include <linux/buffer_head.h> #include "efs.h" -static int efs_readdir(struct file *, void *, filldir_t); +static int efs_readdir(struct file *, struct dir_context *); const struct file_operations efs_dir_operations = { .llseek = generic_file_llseek, .read = generic_read_dir, - .readdir = efs_readdir, + .iterate = efs_readdir, }; const struct inode_operations efs_dir_inode_operations = { .lookup = efs_lookup, }; -static int efs_readdir(struct file *filp, void *dirent, filldir_t filldir) { - struct inode *inode = file_inode(filp); - struct buffer_head *bh; - - struct efs_dir *dirblock; - struct efs_dentry *dirslot; - efs_ino_t inodenum; +static int efs_readdir(struct file *file, struct dir_context *ctx) +{ + struct inode *inode = file_inode(file); efs_block_t block; - int slot, namelen; - char *nameptr; + int slot; if (inode->i_size & (EFS_DIRBSIZE-1)) printk(KERN_WARNING "EFS: WARNING: readdir(): directory size not a multiple of EFS_DIRBSIZE\n"); /* work out where this entry can be found */ - block = filp->f_pos >> EFS_DIRBSIZE_BITS; + block = ctx->pos >> EFS_DIRBSIZE_BITS; /* each block contains at most 256 slots */ - slot = filp->f_pos & 0xff; + slot = ctx->pos & 0xff; /* look at all blocks */ while (block < inode->i_blocks) { + struct efs_dir *dirblock; + struct buffer_head *bh; + /* read the dir block */ bh = sb_bread(inode->i_sb, efs_bmap(inode, block)); @@ -57,11 +55,14 @@ static int efs_readdir(struct file *filp, void *dirent, filldir_t filldir) { break; } - while (slot < dirblock->slots) { - if (dirblock->space[slot] == 0) { - slot++; + for (; slot < dirblock->slots; slot++) { + struct efs_dentry *dirslot; + efs_ino_t inodenum; + const char *nameptr; + int namelen; + + if (dirblock->space[slot] == 0) continue; - } dirslot = (struct efs_dentry *) (((char *) bh->b_data) + EFS_SLOTAT(dirblock, slot)); @@ -72,39 +73,29 @@ static int efs_readdir(struct file *filp, void *dirent, filldir_t filldir) { #ifdef DEBUG printk(KERN_DEBUG "EFS: readdir(): block %d slot %d/%d: inode %u, name \"%s\", namelen %u\n", block, slot, dirblock->slots-1, inodenum, nameptr, namelen); #endif - if (namelen > 0) { - /* found the next entry */ - filp->f_pos = (block << EFS_DIRBSIZE_BITS) | slot; - - /* copy filename and data in dirslot */ - filldir(dirent, nameptr, namelen, filp->f_pos, inodenum, DT_UNKNOWN); - - /* sanity check */ - if (nameptr - (char *) dirblock + namelen > EFS_DIRBSIZE) { - printk(KERN_WARNING "EFS: directory entry %d exceeds directory block\n", slot); - slot++; - continue; - } - - /* store position of next slot */ - if (++slot == dirblock->slots) { - slot = 0; - block++; - } + if (!namelen) + continue; + /* found the next entry */ + ctx->pos = (block << EFS_DIRBSIZE_BITS) | slot; + + /* sanity check */ + if (nameptr - (char *) dirblock + namelen > EFS_DIRBSIZE) { + printk(KERN_WARNING "EFS: directory entry %d exceeds directory block\n", slot); + continue; + } + + /* copy filename and data in dirslot */ + if (!dir_emit(ctx, nameptr, namelen, inodenum, DT_UNKNOWN)) { brelse(bh); - filp->f_pos = (block << EFS_DIRBSIZE_BITS) | slot; - goto out; + return 0; } - slot++; } brelse(bh); slot = 0; block++; } - - filp->f_pos = (block << EFS_DIRBSIZE_BITS) | slot; -out: + ctx->pos = (block << EFS_DIRBSIZE_BITS) | slot; return 0; } |