From: Christoph Hellwig <hch@lst.de>
To: linux-fsdevel@vger.kernel.org
Subject: hfsplus: create correct initial catalog entries for device files
Date: Tue, 12 Oct 2010 15:58:32 +0200 [thread overview]
Message-ID: <20101012135832.GH26867@lst.de> (raw)
In-Reply-To: <20101012135634.GA26867@lst.de>
Make sure the initial insertation of the catalog entry already contains
the device number by calling init_special_inode early and setting writing
out the dev field of the on-disk permission structure. The latter is
facilitated by sharing the almost identical hfsplus_set_perms helpers
between initial catalog entry creating and ->write_inode.
Unless we crashed just after mknod this bug was harmless as the inode
is marked dirty at the end of hfsplus_mknod, and hfsplus_write_inode
will update the catalog entry to contain the correct value.
Signed-off-by: Christoph Hellwig <hch@tuxera.com>
Index: linux-2.6/fs/hfsplus/catalog.c
===================================================================
--- linux-2.6.orig/fs/hfsplus/catalog.c 2010-10-11 20:02:16.780274444 +0200
+++ linux-2.6/fs/hfsplus/catalog.c 2010-10-11 20:02:40.577253560 +0200
@@ -67,7 +67,7 @@ static void hfsplus_cat_build_key_uni(hf
key->key_len = cpu_to_be16(6 + ustrlen);
}
-static void hfsplus_set_perms(struct inode *inode, struct hfsplus_perm *perms)
+void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms)
{
if (inode->i_flags & S_IMMUTABLE)
perms->rootflags |= HFSPLUS_FLG_IMMUTABLE;
@@ -77,10 +77,18 @@ static void hfsplus_set_perms(struct ino
perms->rootflags |= HFSPLUS_FLG_APPEND;
else
perms->rootflags &= ~HFSPLUS_FLG_APPEND;
- HFSPLUS_I(inode)->userflags = perms->userflags;
+
+ perms->userflags = HFSPLUS_I(inode)->userflags;
perms->mode = cpu_to_be16(inode->i_mode);
perms->owner = cpu_to_be32(inode->i_uid);
perms->group = cpu_to_be32(inode->i_gid);
+
+ if (S_ISREG(inode->i_mode))
+ perms->dev = cpu_to_be32(inode->i_nlink);
+ else if (S_ISBLK(inode->i_mode) || S_ISCHR(inode->i_mode))
+ perms->dev = cpu_to_be32(inode->i_rdev);
+ else
+ perms->dev = 0;
}
static int hfsplus_cat_build_record(hfsplus_cat_entry *entry, u32 cnid, struct inode *inode)
@@ -99,7 +107,7 @@ static int hfsplus_cat_build_record(hfsp
folder->content_mod_date =
folder->attribute_mod_date =
folder->access_date = hfsp_now2mt();
- hfsplus_set_perms(inode, &folder->permissions);
+ hfsplus_cat_set_perms(inode, &folder->permissions);
if (inode == sbi->hidden_dir)
/* invisible and namelocked */
folder->user_info.frFlags = cpu_to_be16(0x5000);
@@ -118,7 +126,7 @@ static int hfsplus_cat_build_record(hfsp
file->attribute_mod_date =
file->access_date = hfsp_now2mt();
if (cnid == inode->i_ino) {
- hfsplus_set_perms(inode, &file->permissions);
+ hfsplus_cat_set_perms(inode, &file->permissions);
if (S_ISLNK(inode->i_mode)) {
file->user_info.fdType = cpu_to_be32(HFSP_SYMLINK_TYPE);
file->user_info.fdCreator = cpu_to_be32(HFSP_SYMLINK_CREATOR);
Index: linux-2.6/fs/hfsplus/dir.c
===================================================================
--- linux-2.6.orig/fs/hfsplus/dir.c 2010-10-11 20:01:06.023253839 +0200
+++ linux-2.6/fs/hfsplus/dir.c 2010-10-11 20:02:40.578254049 +0200
@@ -418,6 +418,9 @@ static int hfsplus_mknod(struct inode *d
if (!inode)
goto out;
+ if (S_ISBLK(mode) || S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode))
+ init_special_inode(inode, mode, rdev);
+
res = hfsplus_create_cat(inode->i_ino, dir, &dentry->d_name, inode);
if (res) {
inode->i_nlink = 0;
@@ -426,9 +429,6 @@ static int hfsplus_mknod(struct inode *d
goto out;
}
- if (S_ISBLK(mode) || S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode))
- init_special_inode(inode, mode, rdev);
-
hfsplus_instantiate(dentry, inode, inode->i_ino);
mark_inode_dirty(inode);
out:
Index: linux-2.6/fs/hfsplus/hfsplus_fs.h
===================================================================
--- linux-2.6.orig/fs/hfsplus/hfsplus_fs.h 2010-10-11 20:02:16.780274444 +0200
+++ linux-2.6/fs/hfsplus/hfsplus_fs.h 2010-10-11 20:02:40.584331783 +0200
@@ -326,6 +326,7 @@ int hfsplus_create_cat(u32, struct inode
int hfsplus_delete_cat(u32, struct inode *, struct qstr *);
int hfsplus_rename_cat(u32, struct inode *, struct qstr *,
struct inode *, struct qstr *);
+void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms);
/* dir.c */
extern const struct inode_operations hfsplus_dir_inode_operations;
Index: linux-2.6/fs/hfsplus/inode.c
===================================================================
--- linux-2.6.orig/fs/hfsplus/inode.c 2010-10-11 20:02:16.786004155 +0200
+++ linux-2.6/fs/hfsplus/inode.c 2010-10-11 20:02:40.590255236 +0200
@@ -252,29 +252,6 @@ static void hfsplus_get_perms(struct ino
inode->i_flags &= ~S_APPEND;
}
-static void hfsplus_set_perms(struct inode *inode, struct hfsplus_perm *perms)
-{
- if (inode->i_flags & S_IMMUTABLE)
- perms->rootflags |= HFSPLUS_FLG_IMMUTABLE;
- else
- perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE;
- if (inode->i_flags & S_APPEND)
- perms->rootflags |= HFSPLUS_FLG_APPEND;
- else
- perms->rootflags &= ~HFSPLUS_FLG_APPEND;
- perms->userflags = HFSPLUS_I(inode)->userflags;
- perms->mode = cpu_to_be16(inode->i_mode);
- perms->owner = cpu_to_be32(inode->i_uid);
- perms->group = cpu_to_be32(inode->i_gid);
-
- if (S_ISREG(inode->i_mode))
- perms->dev = cpu_to_be32(inode->i_nlink);
- else if (S_ISBLK(inode->i_mode) || S_ISCHR(inode->i_mode))
- perms->dev = cpu_to_be32(inode->i_rdev);
- else
- perms->dev = 0;
-}
-
static int hfsplus_file_open(struct inode *inode, struct file *file)
{
if (HFSPLUS_IS_RSRC(inode))
@@ -578,7 +555,7 @@ int hfsplus_cat_write_inode(struct inode
hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
sizeof(struct hfsplus_cat_folder));
/* simple node checks? */
- hfsplus_set_perms(inode, &folder->permissions);
+ hfsplus_cat_set_perms(inode, &folder->permissions);
folder->access_date = hfsp_ut2mt(inode->i_atime);
folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
@@ -600,7 +577,7 @@ int hfsplus_cat_write_inode(struct inode
hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
sizeof(struct hfsplus_cat_file));
hfsplus_inode_write_fork(inode, &file->data_fork);
- hfsplus_set_perms(inode, &file->permissions);
+ hfsplus_cat_set_perms(inode, &file->permissions);
if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE)
file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
else
next prev parent reply other threads:[~2010-10-12 13:58 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-12 13:56 hfsplus updates Christoph Hellwig
2010-10-12 13:56 ` hfsplus: fix oops on mount with corrupted btree extent records Christoph Hellwig
2010-10-12 13:57 ` hfs_bnode_find() can fail, resulting in hfs_bnode_split() breakage Christoph Hellwig
2010-10-12 13:57 ` hfsplus: handle more on-disk corruptions without oopsing Christoph Hellwig
2010-10-12 13:57 ` hfsplus: validate btree flags Christoph Hellwig
2010-10-12 13:58 ` hfsplus: fix link corruption Christoph Hellwig
2010-10-12 13:58 ` hfsplus: remove superflous rootflags field in hfsplus_inode_info Christoph Hellwig
2010-10-12 13:58 ` Christoph Hellwig [this message]
2010-10-12 13:58 ` hfsplus: remove the unused hfsplus_kmap/hfsplus_kunmap helpers Christoph Hellwig
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