From 3b9d4ed26680771295d904a6b83e88e620780893 Mon Sep 17 00:00:00 2001 From: Theodore Ts'o Date: Sat, 25 Apr 2009 22:54:04 -0400 Subject: ext4: Replace lock/unlock_super() with an explicit lock for the orphan list Use a separate lock to protect the orphan list, so we can stop overloading the use of lock_super(). Signed-off-by: "Theodore Ts'o" --- fs/ext4/namei.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) (limited to 'fs/ext4/namei.c') diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 22098e1cd085..8018e49a7287 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -1997,7 +1997,7 @@ int ext4_orphan_add(handle_t *handle, struct inode *inode) if (!ext4_handle_valid(handle)) return 0; - lock_super(sb); + mutex_lock(&EXT4_SB(sb)->s_orphan_lock); if (!list_empty(&EXT4_I(inode)->i_orphan)) goto out_unlock; @@ -2006,9 +2006,13 @@ int ext4_orphan_add(handle_t *handle, struct inode *inode) /* @@@ FIXME: Observation from aviro: * I think I can trigger J_ASSERT in ext4_orphan_add(). We block - * here (on lock_super()), so race with ext4_link() which might bump + * here (on s_orphan_lock), so race with ext4_link() which might bump * ->i_nlink. For, say it, character device. Not a regular file, * not a directory, not a symlink and ->i_nlink > 0. + * + * tytso, 4/25/2009: I'm not sure how that could happen; + * shouldn't the fs core protect us from these sort of + * unlink()/link() races? */ J_ASSERT((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) || inode->i_nlink == 0); @@ -2045,7 +2049,7 @@ int ext4_orphan_add(handle_t *handle, struct inode *inode) jbd_debug(4, "orphan inode %lu will point to %d\n", inode->i_ino, NEXT_ORPHAN(inode)); out_unlock: - unlock_super(sb); + mutex_unlock(&EXT4_SB(sb)->s_orphan_lock); ext4_std_error(inode->i_sb, err); return err; } @@ -2066,11 +2070,9 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode) if (!ext4_handle_valid(handle)) return 0; - lock_super(inode->i_sb); - if (list_empty(&ei->i_orphan)) { - unlock_super(inode->i_sb); - return 0; - } + mutex_lock(&EXT4_SB(inode->i_sb)->s_orphan_lock); + if (list_empty(&ei->i_orphan)) + goto out; ino_next = NEXT_ORPHAN(inode); prev = ei->i_orphan.prev; @@ -2120,7 +2122,7 @@ int ext4_orphan_del(handle_t *handle, struct inode *inode) out_err: ext4_std_error(inode->i_sb, err); out: - unlock_super(inode->i_sb); + mutex_unlock(&EXT4_SB(inode->i_sb)->s_orphan_lock); return err; out_brelse: -- cgit v1.2.3 From 596397b77c895d0fa3674f579c94ad5ea88ef01d Mon Sep 17 00:00:00 2001 From: Theodore Ts'o Date: Fri, 1 May 2009 13:49:15 -0400 Subject: ext4: Move fs/ext4/namei.h into ext4.h The fs/ext4/namei.h header file had only a single function declaration, and should have never been a standalone file. Move it into ext4.h, where should have been from the beginning. Signed-off-by: "Theodore Ts'o" --- fs/ext4/namei.c | 1 - 1 file changed, 1 deletion(-) (limited to 'fs/ext4/namei.c') diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 8018e49a7287..c9690b250e5e 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -37,7 +37,6 @@ #include "ext4.h" #include "ext4_jbd2.h" -#include "namei.h" #include "xattr.h" #include "acl.h" -- cgit v1.2.3 From abc8746eb91fb01e8d411896f80f7687c0d8372e Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Sat, 2 May 2009 22:54:32 -0400 Subject: ext4: hook fiemap operation for directories Add fiemap callback for directories Signed-off-by: Aneesh Kumar K.V Signed-off-by: "Theodore Ts'o" --- fs/ext4/namei.c | 1 + 1 file changed, 1 insertion(+) (limited to 'fs/ext4/namei.c') diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index c9690b250e5e..f2bc160463b7 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -2534,6 +2534,7 @@ const struct inode_operations ext4_dir_inode_operations = { .removexattr = generic_removexattr, #endif .permission = ext4_permission, + .fiemap = ext4_fiemap, }; const struct inode_operations ext4_special_inode_operations = { -- cgit v1.2.3 From 9aee2286071c23c535fe9928eec1a26e0bcf256d Mon Sep 17 00:00:00 2001 From: Toshiyuki Okajima Date: Mon, 8 Jun 2009 12:41:35 -0400 Subject: ext4: fix dx_map_entry to support 256k directory blocks The dx_map_entry structure doesn't support over 64KB block size by current usage of its member("offs"). Because "offs" treats an offset of copies of the ext4_dir_entry_2 structure as is. This member size is 16 bits. But real offset for over 64KB(256KB) block size needs 18 bits. However, real offset keeps 4 byte boundary, so lower 2 bits is not used. Therefore, we do the following to fix this limitation: For "store": we divide the real offset by 4 and then store this result to "offs" member. For "use": we multiply "offs" member by 4 and then use this result as real offset. Signed-off-by: Toshiyuki Okajima Signed-off-by: "Theodore Ts'o" --- fs/ext4/namei.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'fs/ext4/namei.c') diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index f2bc160463b7..07eb6649e4fa 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -749,7 +749,7 @@ static int dx_make_map(struct ext4_dir_entry_2 *de, unsigned blocksize, ext4fs_dirhash(de->name, de->name_len, &h); map_tail--; map_tail->hash = h.hash; - map_tail->offs = (u16) ((char *) de - base); + map_tail->offs = ((char *) de - base)>>2; map_tail->size = le16_to_cpu(de->rec_len); count++; cond_resched(); @@ -1147,7 +1147,8 @@ dx_move_dirents(char *from, char *to, struct dx_map_entry *map, int count, unsigned rec_len = 0; while (count--) { - struct ext4_dir_entry_2 *de = (struct ext4_dir_entry_2 *) (from + map->offs); + struct ext4_dir_entry_2 *de = (struct ext4_dir_entry_2 *) + (from + (map->offs<<2)); rec_len = EXT4_DIR_REC_LEN(de->name_len); memcpy (to, de, rec_len); ((struct ext4_dir_entry_2 *) to)->rec_len = -- cgit v1.2.3