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Diffstat (limited to 'fs/reiserfs/xattr.c')
-rw-r--r--fs/reiserfs/xattr.c2173
1 files changed, 1087 insertions, 1086 deletions
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index 45582fe8b46..e386d3db305 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -51,67 +51,68 @@
#define PRIVROOT_NAME ".reiserfs_priv"
#define XAROOT_NAME "xattrs"
-static struct reiserfs_xattr_handler *find_xattr_handler_prefix (const char *prefix);
+static struct reiserfs_xattr_handler *find_xattr_handler_prefix(const char
+ *prefix);
-static struct dentry *
-create_xa_root (struct super_block *sb)
+static struct dentry *create_xa_root(struct super_block *sb)
{
- struct dentry *privroot = dget (REISERFS_SB(sb)->priv_root);
- struct dentry *xaroot;
-
- /* This needs to be created at mount-time */
- if (!privroot)
- return ERR_PTR(-EOPNOTSUPP);
-
- xaroot = lookup_one_len (XAROOT_NAME, privroot, strlen (XAROOT_NAME));
- if (IS_ERR (xaroot)) {
- goto out;
- } else if (!xaroot->d_inode) {
- int err;
- down (&privroot->d_inode->i_sem);
- err = privroot->d_inode->i_op->mkdir (privroot->d_inode, xaroot, 0700);
- up (&privroot->d_inode->i_sem);
-
- if (err) {
- dput (xaroot);
- dput (privroot);
- return ERR_PTR (err);
- }
- REISERFS_SB(sb)->xattr_root = dget (xaroot);
- }
-
-out:
- dput (privroot);
- return xaroot;
+ struct dentry *privroot = dget(REISERFS_SB(sb)->priv_root);
+ struct dentry *xaroot;
+
+ /* This needs to be created at mount-time */
+ if (!privroot)
+ return ERR_PTR(-EOPNOTSUPP);
+
+ xaroot = lookup_one_len(XAROOT_NAME, privroot, strlen(XAROOT_NAME));
+ if (IS_ERR(xaroot)) {
+ goto out;
+ } else if (!xaroot->d_inode) {
+ int err;
+ down(&privroot->d_inode->i_sem);
+ err =
+ privroot->d_inode->i_op->mkdir(privroot->d_inode, xaroot,
+ 0700);
+ up(&privroot->d_inode->i_sem);
+
+ if (err) {
+ dput(xaroot);
+ dput(privroot);
+ return ERR_PTR(err);
+ }
+ REISERFS_SB(sb)->xattr_root = dget(xaroot);
+ }
+
+ out:
+ dput(privroot);
+ return xaroot;
}
/* This will return a dentry, or error, refering to the xa root directory.
* If the xa root doesn't exist yet, the dentry will be returned without
* an associated inode. This dentry can be used with ->mkdir to create
* the xa directory. */
-static struct dentry *
-__get_xa_root (struct super_block *s)
+static struct dentry *__get_xa_root(struct super_block *s)
{
- struct dentry *privroot = dget (REISERFS_SB(s)->priv_root);
- struct dentry *xaroot = NULL;
-
- if (IS_ERR (privroot) || !privroot)
- return privroot;
-
- xaroot = lookup_one_len (XAROOT_NAME, privroot, strlen (XAROOT_NAME));
- if (IS_ERR (xaroot)) {
- goto out;
- } else if (!xaroot->d_inode) {
- dput (xaroot);
- xaroot = NULL;
- goto out;
- }
-
- REISERFS_SB(s)->xattr_root = dget (xaroot);
-
-out:
- dput (privroot);
- return xaroot;
+ struct dentry *privroot = dget(REISERFS_SB(s)->priv_root);
+ struct dentry *xaroot = NULL;
+
+ if (IS_ERR(privroot) || !privroot)
+ return privroot;
+
+ xaroot = lookup_one_len(XAROOT_NAME, privroot, strlen(XAROOT_NAME));
+ if (IS_ERR(xaroot)) {
+ goto out;
+ } else if (!xaroot->d_inode) {
+ dput(xaroot);
+ xaroot = NULL;
+ goto out;
+ }
+
+ REISERFS_SB(s)->xattr_root = dget(xaroot);
+
+ out:
+ dput(privroot);
+ return xaroot;
}
/* Returns the dentry (or NULL) referring to the root of the extended
@@ -119,147 +120,145 @@ out:
* Otherwise, we attempt to retreive it from disk. It may also return
* a pointer-encoded error.
*/
-static inline struct dentry *
-get_xa_root (struct super_block *s)
+static inline struct dentry *get_xa_root(struct super_block *s)
{
- struct dentry *dentry = dget (REISERFS_SB(s)->xattr_root);
+ struct dentry *dentry = dget(REISERFS_SB(s)->xattr_root);
- if (!dentry)
- dentry = __get_xa_root (s);
+ if (!dentry)
+ dentry = __get_xa_root(s);
- return dentry;
+ return dentry;
}
/* Opens the directory corresponding to the inode's extended attribute store.
* If flags allow, the tree to the directory may be created. If creation is
* prohibited, -ENODATA is returned. */
-static struct dentry *
-open_xa_dir (const struct inode *inode, int flags)
+static struct dentry *open_xa_dir(const struct inode *inode, int flags)
{
- struct dentry *xaroot, *xadir;
- char namebuf[17];
-
- xaroot = get_xa_root (inode->i_sb);
- if (IS_ERR (xaroot)) {
- return xaroot;
- } else if (!xaroot) {
- if (flags == 0 || flags & XATTR_CREATE) {
- xaroot = create_xa_root (inode->i_sb);
- if (IS_ERR (xaroot))
- return xaroot;
- }
- if (!xaroot)
- return ERR_PTR (-ENODATA);
- }
-
- /* ok, we have xaroot open */
-
- snprintf (namebuf, sizeof (namebuf), "%X.%X",
- le32_to_cpu (INODE_PKEY (inode)->k_objectid),
- inode->i_generation);
- xadir = lookup_one_len (namebuf, xaroot, strlen (namebuf));
- if (IS_ERR (xadir)) {
- dput (xaroot);
- return xadir;
- }
-
- if (!xadir->d_inode) {
- int err;
- if (flags == 0 || flags & XATTR_CREATE) {
- /* Although there is nothing else trying to create this directory,
- * another directory with the same hash may be created, so we need
- * to protect against that */
- err = xaroot->d_inode->i_op->mkdir (xaroot->d_inode, xadir, 0700);
- if (err) {
- dput (xaroot);
- dput (xadir);
- return ERR_PTR (err);
- }
- }
- if (!xadir->d_inode) {
- dput (xaroot);
- dput (xadir);
- return ERR_PTR (-ENODATA);
- }
- }
-
- dput (xaroot);
- return xadir;
+ struct dentry *xaroot, *xadir;
+ char namebuf[17];
+
+ xaroot = get_xa_root(inode->i_sb);
+ if (IS_ERR(xaroot)) {
+ return xaroot;
+ } else if (!xaroot) {
+ if (flags == 0 || flags & XATTR_CREATE) {
+ xaroot = create_xa_root(inode->i_sb);
+ if (IS_ERR(xaroot))
+ return xaroot;
+ }
+ if (!xaroot)
+ return ERR_PTR(-ENODATA);
+ }
+
+ /* ok, we have xaroot open */
+
+ snprintf(namebuf, sizeof(namebuf), "%X.%X",
+ le32_to_cpu(INODE_PKEY(inode)->k_objectid),
+ inode->i_generation);
+ xadir = lookup_one_len(namebuf, xaroot, strlen(namebuf));
+ if (IS_ERR(xadir)) {
+ dput(xaroot);
+ return xadir;
+ }
+
+ if (!xadir->d_inode) {
+ int err;
+ if (flags == 0 || flags & XATTR_CREATE) {
+ /* Although there is nothing else trying to create this directory,
+ * another directory with the same hash may be created, so we need
+ * to protect against that */
+ err =
+ xaroot->d_inode->i_op->mkdir(xaroot->d_inode, xadir,
+ 0700);
+ if (err) {
+ dput(xaroot);
+ dput(xadir);
+ return ERR_PTR(err);
+ }
+ }
+ if (!xadir->d_inode) {
+ dput(xaroot);
+ dput(xadir);
+ return ERR_PTR(-ENODATA);
+ }
+ }
+
+ dput(xaroot);
+ return xadir;
}
/* Returns a dentry corresponding to a specific extended attribute file
* for the inode. If flags allow, the file is created. Otherwise, a
* valid or negative dentry, or an error is returned. */
-static struct dentry *
-get_xa_file_dentry (const struct inode *inode, const char *name, int flags)
+static struct dentry *get_xa_file_dentry(const struct inode *inode,
+ const char *name, int flags)
{
- struct dentry *xadir, *xafile;
- int err = 0;
-
- xadir = open_xa_dir (inode, flags);
- if (IS_ERR (xadir)) {
- return ERR_PTR (PTR_ERR (xadir));
- } else if (xadir && !xadir->d_inode) {
- dput (xadir);
- return ERR_PTR (-ENODATA);
- }
-
- xafile = lookup_one_len (name, xadir, strlen (name));
- if (IS_ERR (xafile)) {
- dput (xadir);
- return ERR_PTR (PTR_ERR (xafile));
- }
-
- if (xafile->d_inode) { /* file exists */
- if (flags & XATTR_CREATE) {
- err = -EEXIST;
- dput (xafile);
- goto out;
- }
- } else if (flags & XATTR_REPLACE || flags & FL_READONLY) {
- goto out;
- } else {
- /* inode->i_sem is down, so nothing else can try to create
- * the same xattr */
- err = xadir->d_inode->i_op->create (xadir->d_inode, xafile,
- 0700|S_IFREG, NULL);
-
- if (err) {
- dput (xafile);
- goto out;
- }
- }
-
-out:
- dput (xadir);
- if (err)
- xafile = ERR_PTR (err);
- return xafile;
-}
+ struct dentry *xadir, *xafile;
+ int err = 0;
+
+ xadir = open_xa_dir(inode, flags);
+ if (IS_ERR(xadir)) {
+ return ERR_PTR(PTR_ERR(xadir));
+ } else if (xadir && !xadir->d_inode) {
+ dput(xadir);
+ return ERR_PTR(-ENODATA);
+ }
+
+ xafile = lookup_one_len(name, xadir, strlen(name));
+ if (IS_ERR(xafile)) {
+ dput(xadir);
+ return ERR_PTR(PTR_ERR(xafile));
+ }
+
+ if (xafile->d_inode) { /* file exists */
+ if (flags & XATTR_CREATE) {
+ err = -EEXIST;
+ dput(xafile);
+ goto out;
+ }
+ } else if (flags & XATTR_REPLACE || flags & FL_READONLY) {
+ goto out;
+ } else {
+ /* inode->i_sem is down, so nothing else can try to create
+ * the same xattr */
+ err = xadir->d_inode->i_op->create(xadir->d_inode, xafile,
+ 0700 | S_IFREG, NULL);
+
+ if (err) {
+ dput(xafile);
+ goto out;
+ }
+ }
+ out:
+ dput(xadir);
+ if (err)
+ xafile = ERR_PTR(err);
+ return xafile;
+}
/* Opens a file pointer to the attribute associated with inode */
-static struct file *
-open_xa_file (const struct inode *inode, const char *name, int flags)
+static struct file *open_xa_file(const struct inode *inode, const char *name,
+ int flags)
{
- struct dentry *xafile;
- struct file *fp;
-
- xafile = get_xa_file_dentry (inode, name, flags);
- if (IS_ERR (xafile))
- return ERR_PTR (PTR_ERR (xafile));
- else if (!xafile->d_inode) {
- dput (xafile);
- return ERR_PTR (-ENODATA);
- }
+ struct dentry *xafile;
+ struct file *fp;
+
+ xafile = get_xa_file_dentry(inode, name, flags);
+ if (IS_ERR(xafile))
+ return ERR_PTR(PTR_ERR(xafile));
+ else if (!xafile->d_inode) {
+ dput(xafile);
+ return ERR_PTR(-ENODATA);
+ }
- fp = dentry_open (xafile, NULL, O_RDWR);
- /* dentry_open dputs the dentry if it fails */
+ fp = dentry_open(xafile, NULL, O_RDWR);
+ /* dentry_open dputs the dentry if it fails */
- return fp;
+ return fp;
}
-
/*
* this is very similar to fs/reiserfs/dir.c:reiserfs_readdir, but
* we need to drop the path before calling the filldir struct. That
@@ -273,139 +272,146 @@ open_xa_file (const struct inode *inode, const char *name, int flags)
* we're called with i_sem held, so there are no worries about the directory
* changing underneath us.
*/
-static int __xattr_readdir(struct file * filp, void * dirent, filldir_t filldir)
+static int __xattr_readdir(struct file *filp, void *dirent, filldir_t filldir)
{
- struct inode *inode = filp->f_dentry->d_inode;
- struct cpu_key pos_key; /* key of current position in the directory (key of directory entry) */
- INITIALIZE_PATH (path_to_entry);
- struct buffer_head * bh;
- int entry_num;
- struct item_head * ih, tmp_ih;
- int search_res;
- char * local_buf;
- loff_t next_pos;
- char small_buf[32] ; /* avoid kmalloc if we can */
- struct reiserfs_de_head *deh;
- int d_reclen;
- char * d_name;
- off_t d_off;
- ino_t d_ino;
- struct reiserfs_dir_entry de;
-
-
- /* form key for search the next directory entry using f_pos field of
- file structure */
- next_pos = max_reiserfs_offset(inode);
-
- while (1) {
-research:
- if (next_pos <= DOT_DOT_OFFSET)
- break;
- make_cpu_key (&pos_key, inode, next_pos, TYPE_DIRENTRY, 3);
-
- search_res = search_by_entry_key(inode->i_sb, &pos_key, &path_to_entry, &de);
- if (search_res == IO_ERROR) {
- // FIXME: we could just skip part of directory which could
- // not be read
- pathrelse(&path_to_entry);
- return -EIO;
- }
-
- if (search_res == NAME_NOT_FOUND)
- de.de_entry_num--;
+ struct inode *inode = filp->f_dentry->d_inode;
+ struct cpu_key pos_key; /* key of current position in the directory (key of directory entry) */
+ INITIALIZE_PATH(path_to_entry);
+ struct buffer_head *bh;
+ int entry_num;
+ struct item_head *ih, tmp_ih;
+ int search_res;
+ char *local_buf;
+ loff_t next_pos;
+ char small_buf[32]; /* avoid kmalloc if we can */
+ struct reiserfs_de_head *deh;
+ int d_reclen;
+ char *d_name;
+ off_t d_off;
+ ino_t d_ino;
+ struct reiserfs_dir_entry de;
+
+ /* form key for search the next directory entry using f_pos field of
+ file structure */
+ next_pos = max_reiserfs_offset(inode);
+
+ while (1) {
+ research:
+ if (next_pos <= DOT_DOT_OFFSET)
+ break;
+ make_cpu_key(&pos_key, inode, next_pos, TYPE_DIRENTRY, 3);
+
+ search_res =
+ search_by_entry_key(inode->i_sb, &pos_key, &path_to_entry,
+ &de);
+ if (search_res == IO_ERROR) {
+ // FIXME: we could just skip part of directory which could
+ // not be read
+ pathrelse(&path_to_entry);
+ return -EIO;
+ }
- set_de_name_and_namelen(&de);
- entry_num = de.de_entry_num;
- deh = &(de.de_deh[entry_num]);
+ if (search_res == NAME_NOT_FOUND)
+ de.de_entry_num--;
- bh = de.de_bh;
- ih = de.de_ih;
+ set_de_name_and_namelen(&de);
+ entry_num = de.de_entry_num;
+ deh = &(de.de_deh[entry_num]);
- if (!is_direntry_le_ih(ih)) {
- reiserfs_warning(inode->i_sb, "not direntry %h", ih);
- break;
- }
- copy_item_head(&tmp_ih, ih);
+ bh = de.de_bh;
+ ih = de.de_ih;
- /* we must have found item, that is item of this directory, */
- RFALSE( COMP_SHORT_KEYS (&(ih->ih_key), &pos_key),
- "vs-9000: found item %h does not match to dir we readdir %K",
- ih, &pos_key);
+ if (!is_direntry_le_ih(ih)) {
+ reiserfs_warning(inode->i_sb, "not direntry %h", ih);
+ break;
+ }
+ copy_item_head(&tmp_ih, ih);
- if (deh_offset(deh) <= DOT_DOT_OFFSET) {
- break;
- }
+ /* we must have found item, that is item of this directory, */
+ RFALSE(COMP_SHORT_KEYS(&(ih->ih_key), &pos_key),
+ "vs-9000: found item %h does not match to dir we readdir %K",
+ ih, &pos_key);
- /* look for the previous entry in the directory */
- next_pos = deh_offset (deh) - 1;
+ if (deh_offset(deh) <= DOT_DOT_OFFSET) {
+ break;
+ }
- if (!de_visible (deh))
- /* it is hidden entry */
- continue;
+ /* look for the previous entry in the directory */
+ next_pos = deh_offset(deh) - 1;
- d_reclen = entry_length(bh, ih, entry_num);
- d_name = B_I_DEH_ENTRY_FILE_NAME (bh, ih, deh);
- d_off = deh_offset (deh);
- d_ino = deh_objectid (deh);
+ if (!de_visible(deh))
+ /* it is hidden entry */
+ continue;
- if (!d_name[d_reclen - 1])
- d_reclen = strlen (d_name);
+ d_reclen = entry_length(bh, ih, entry_num);
+ d_name = B_I_DEH_ENTRY_FILE_NAME(bh, ih, deh);
+ d_off = deh_offset(deh);
+ d_ino = deh_objectid(deh);
- if (d_reclen > REISERFS_MAX_NAME(inode->i_sb->s_blocksize)){
- /* too big to send back to VFS */
- continue ;
- }
+ if (!d_name[d_reclen - 1])
+ d_reclen = strlen(d_name);
- /* Ignore the .reiserfs_priv entry */
- if (reiserfs_xattrs (inode->i_sb) &&
- !old_format_only(inode->i_sb) &&
- deh_objectid (deh) == le32_to_cpu (INODE_PKEY(REISERFS_SB(inode->i_sb)->priv_root->d_inode)->k_objectid))
- continue;
+ if (d_reclen > REISERFS_MAX_NAME(inode->i_sb->s_blocksize)) {
+ /* too big to send back to VFS */
+ continue;
+ }
- if (d_reclen <= 32) {
- local_buf = small_buf ;
- } else {
- local_buf = reiserfs_kmalloc(d_reclen, GFP_NOFS, inode->i_sb) ;
- if (!local_buf) {
- pathrelse (&path_to_entry);
- return -ENOMEM ;
- }
- if (item_moved (&tmp_ih, &path_to_entry)) {
- reiserfs_kfree(local_buf, d_reclen, inode->i_sb) ;
-
- /* sigh, must retry. Do this same offset again */
- next_pos = d_off;
- goto research;
- }
- }
+ /* Ignore the .reiserfs_priv entry */
+ if (reiserfs_xattrs(inode->i_sb) &&
+ !old_format_only(inode->i_sb) &&
+ deh_objectid(deh) ==
+ le32_to_cpu(INODE_PKEY
+ (REISERFS_SB(inode->i_sb)->priv_root->d_inode)->
+ k_objectid))
+ continue;
+
+ if (d_reclen <= 32) {
+ local_buf = small_buf;
+ } else {
+ local_buf =
+ reiserfs_kmalloc(d_reclen, GFP_NOFS, inode->i_sb);
+ if (!local_buf) {
+ pathrelse(&path_to_entry);
+ return -ENOMEM;
+ }
+ if (item_moved(&tmp_ih, &path_to_entry)) {
+ reiserfs_kfree(local_buf, d_reclen,
+ inode->i_sb);
+
+ /* sigh, must retry. Do this same offset again */
+ next_pos = d_off;
+ goto research;
+ }
+ }
- // Note, that we copy name to user space via temporary
- // buffer (local_buf) because filldir will block if
- // user space buffer is swapped out. At that time
- // entry can move to somewhere else
- memcpy (local_buf, d_name, d_reclen);
+ // Note, that we copy name to user space via temporary
+ // buffer (local_buf) because filldir will block if
+ // user space buffer is swapped out. At that time
+ // entry can move to somewhere else
+ memcpy(local_buf, d_name, d_reclen);
- /* the filldir function might need to start transactions,
- * or do who knows what. Release the path now that we've
- * copied all the important stuff out of the deh
- */
- pathrelse (&path_to_entry);
-
- if (filldir (dirent, local_buf, d_reclen, d_off, d_ino,
- DT_UNKNOWN) < 0) {
- if (local_buf != small_buf) {
- reiserfs_kfree(local_buf, d_reclen, inode->i_sb) ;
- }
- goto end;
- }
- if (local_buf != small_buf) {
- reiserfs_kfree(local_buf, d_reclen, inode->i_sb) ;
- }
- } /* while */
+ /* the filldir function might need to start transactions,
+ * or do who knows what. Release the path now that we've
+ * copied all the important stuff out of the deh
+ */
+ pathrelse(&path_to_entry);
+
+ if (filldir(dirent, local_buf, d_reclen, d_off, d_ino,
+ DT_UNKNOWN) < 0) {
+ if (local_buf != small_buf) {
+ reiserfs_kfree(local_buf, d_reclen,
+ inode->i_sb);
+ }
+ goto end;
+ }
+ if (local_buf != small_buf) {
+ reiserfs_kfree(local_buf, d_reclen, inode->i_sb);
+ }
+ } /* while */
-end:
- pathrelse (&path_to_entry);
- return 0;
+ end:
+ pathrelse(&path_to_entry);
+ return 0;
}
/*
@@ -417,63 +423,59 @@ end:
static
int xattr_readdir(struct file *file, filldir_t filler, void *buf)
{
- struct inode *inode = file->f_dentry->d_inode;
- int res = -ENOTDIR;
- if (!file->f_op || !file->f_op->readdir)
- goto out;
- down(&inode->i_sem);
+ struct inode *inode = file->f_dentry->d_inode;
+ int res = -ENOTDIR;
+ if (!file->f_op || !file->f_op->readdir)
+ goto out;
+ down(&inode->i_sem);
// down(&inode->i_zombie);
- res = -ENOENT;
- if (!IS_DEADDIR(inode)) {
- lock_kernel();
- res = __xattr_readdir(file, buf, filler);
- unlock_kernel();
- }
+ res = -ENOENT;
+ if (!IS_DEADDIR(inode)) {
+ lock_kernel();
+ res = __xattr_readdir(file, buf, filler);
+ unlock_kernel();
+ }
// up(&inode->i_zombie);
- up(&inode->i_sem);
-out:
- return res;
+ up(&inode->i_sem);
+ out:
+ return res;
}
-
/* Internal operations on file data */
-static inline void
-reiserfs_put_page(struct page *page)
+static inline void reiserfs_put_page(struct page *page)
{
- kunmap(page);
- page_cache_release(page);
+ kunmap(page);
+ page_cache_release(page);
}
-static struct page *
-reiserfs_get_page(struct inode *dir, unsigned long n)
+static struct page *reiserfs_get_page(struct inode *dir, unsigned long n)
{
- struct address_space *mapping = dir->i_mapping;
- struct page *page;
- /* We can deadlock if we try to free dentries,
- and an unlink/rmdir has just occured - GFP_NOFS avoids this */
- mapping->flags = (mapping->flags & ~__GFP_BITS_MASK) | GFP_NOFS;
- page = read_cache_page (mapping, n,
- (filler_t*)mapping->a_ops->readpage, NULL);
- if (!IS_ERR(page)) {
- wait_on_page_locked(page);
- kmap(page);
- if (!PageUptodate(page))
- goto fail;
-
- if (PageError(page))
- goto fail;
- }
- return page;
-
-fail:
- reiserfs_put_page(page);
- return ERR_PTR(-EIO);
+ struct address_space *mapping = dir->i_mapping;
+ struct page *page;
+ /* We can deadlock if we try to free dentries,
+ and an unlink/rmdir has just occured - GFP_NOFS avoids this */
+ mapping->flags = (mapping->flags & ~__GFP_BITS_MASK) | GFP_NOFS;
+ page = read_cache_page(mapping, n,
+ (filler_t *) mapping->a_ops->readpage, NULL);
+ if (!IS_ERR(page)) {
+ wait_on_page_locked(page);
+ kmap(page);
+ if (!PageUptodate(page))
+ goto fail;
+
+ if (PageError(page))
+ goto fail;
+ }
+ return page;
+
+ fail:
+ reiserfs_put_page(page);
+ return ERR_PTR(-EIO);
}
-static inline __u32
-xattr_hash (const char *msg, int len)
+static inline __u32 xattr_hash(const char *msg, int len)
{
- return csum_partial (msg, len, 0);
+ return csum_partial(msg, len, 0);
}
/* Generic extended attribute operations that can be used by xa plugins */
@@ -482,294 +484,300 @@ xattr_hash (const char *msg, int len)
* inode->i_sem: down
*/
int
-reiserfs_xattr_set (struct inode *inode, const char *name, const void *buffer,
- size_t buffer_size, int flags)
+reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
+ size_t buffer_size, int flags)
{
- int err = 0;
- struct file *fp;
- struct page *page;
- char *data;
- struct address_space *mapping;
- size_t file_pos = 0;
- size_t buffer_pos = 0;
- struct inode *xinode;
- struct iattr newattrs;
- __u32 xahash = 0;
-
- if (IS_RDONLY (inode))
- return -EROFS;
-
- if (IS_IMMUTABLE (inode) || IS_APPEND (inode))
- return -EPERM;
-
- if (get_inode_sd_version (inode) == STAT_DATA_V1)
- return -EOPNOTSUPP;
-
- /* Empty xattrs are ok, they're just empty files, no hash */
- if (buffer && buffer_size)
- xahash = xattr_hash (buffer, buffer_size);
-
-open_file:
- fp = open_xa_file (inode, name, flags);
- if (IS_ERR (fp)) {
- err = PTR_ERR (fp);
- goto out;
- }
-
- xinode = fp->f_dentry->d_inode;
- REISERFS_I(inode)->i_flags |= i_has_xattr_dir;
-
- /* we need to copy it off.. */
- if (xinode->i_nlink > 1) {
- fput(fp);
- err = reiserfs_xattr_del (inode, name);
- if (err < 0)
- goto out;
- /* We just killed the old one, we're not replacing anymore */
- if (flags & XATTR_REPLACE)
- flags &= ~XATTR_REPLACE;
- goto open_file;
- }
-
- /* Resize it so we're ok to write there */
- newattrs.ia_size = buffer_size;
- newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
- down (&xinode->i_sem);
- err = notify_change(fp->f_dentry, &newattrs);
- if (err)
- goto out_filp;
-
- mapping = xinode->i_mapping;
- while (buffer_pos < buffer_size || buffer_pos == 0) {
- size_t chunk;
- size_t skip = 0;
- size_t page_offset = (file_pos & (PAGE_CACHE_SIZE - 1));
- if (buffer_size - buffer_pos > PAGE_CACHE_SIZE)
- chunk = PAGE_CACHE_SIZE;
- else
- chunk = buffer_size - buffer_pos;
-
- page = reiserfs_get_page (xinode, file_pos >> PAGE_CACHE_SHIFT);
- if (IS_ERR (page)) {
- err = PTR_ERR (page);
- goto out_filp;
- }
-
- lock_page (page);
- data = page_address (page);
-
- if (file_pos == 0) {
- struct reiserfs_xattr_header *rxh;
- skip = file_pos = sizeof (struct reiserfs_xattr_header);
- if (chunk + skip > PAGE_CACHE_SIZE)
- chunk = PAGE_CACHE_SIZE - skip;
- rxh = (struct reiserfs_xattr_header *)data;
- rxh->h_magic = cpu_to_le32 (REISERFS_XATTR_MAGIC);
- rxh->h_hash = cpu_to_le32 (xahash);
- }
-
- err = mapping->a_ops->prepare_write (fp, page, page_offset,
- page_offset + chunk + skip);
- if (!err) {
- if (buffer)
- memcpy (data + skip, buffer + buffer_pos, chunk);
- err = mapping->a_ops->commit_write (fp, page, page_offset,
- page_offset + chunk + skip);
+ int err = 0;
+ struct file *fp;
+ struct page *page;
+ char *data;
+ struct address_space *mapping;
+ size_t file_pos = 0;
+ size_t buffer_pos = 0;
+ struct inode *xinode;
+ struct iattr newattrs;
+ __u32 xahash = 0;
+
+ if (IS_RDONLY(inode))
+ return -EROFS;
+
+ if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+ return -EPERM;
+
+ if (get_inode_sd_version(inode) == STAT_DATA_V1)
+ return -EOPNOTSUPP;
+
+ /* Empty xattrs are ok, they're just empty files, no hash */
+ if (buffer && buffer_size)
+ xahash = xattr_hash(buffer, buffer_size);
+
+ open_file:
+ fp = open_xa_file(inode, name, flags);
+ if (IS_ERR(fp)) {
+ err = PTR_ERR(fp);
+ goto out;
+ }
+
+ xinode = fp->f_dentry->d_inode;
+ REISERFS_I(inode)->i_flags |= i_has_xattr_dir;
+
+ /* we need to copy it off.. */
+ if (xinode->i_nlink > 1) {
+ fput(fp);
+ err = reiserfs_xattr_del(inode, name);
+ if (err < 0)
+ goto out;
+ /* We just killed the old one, we're not replacing anymore */
+ if (flags & XATTR_REPLACE)
+ flags &= ~XATTR_REPLACE;
+ goto open_file;
+ }
+
+ /* Resize it so we're ok to write there */
+ newattrs.ia_size = buffer_size;
+ newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
+ down(&xinode->i_sem);
+ err = notify_change(fp->f_dentry, &newattrs);
+ if (err)
+ goto out_filp;
+
+ mapping = xinode->i_mapping;
+ while (buffer_pos < buffer_size || buffer_pos == 0) {
+ size_t chunk;
+ size_t skip = 0;
+ size_t page_offset = (file_pos & (PAGE_CACHE_SIZE - 1));
+ if (buffer_size - buffer_pos > PAGE_CACHE_SIZE)
+ chunk = PAGE_CACHE_SIZE;
+ else
+ chunk = buffer_size - buffer_pos;
+
+ page = reiserfs_get_page(xinode, file_pos >> PAGE_CACHE_SHIFT);
+ if (IS_ERR(page)) {
+ err = PTR_ERR(page);
+ goto out_filp;
+ }
+
+ lock_page(page);
+ data = page_address(page);
+
+ if (file_pos == 0) {
+ struct reiserfs_xattr_header *rxh;
+ skip = file_pos = sizeof(struct reiserfs_xattr_header);
+ if (chunk + skip > PAGE_CACHE_SIZE)
+ chunk = PAGE_CACHE_SIZE - skip;
+ rxh = (struct reiserfs_xattr_header *)data;
+ rxh->h_magic = cpu_to_le32(REISERFS_XATTR_MAGIC);
+ rxh->h_hash = cpu_to_le32(xahash);
+ }
+
+ err = mapping->a_ops->prepare_write(fp, page, page_offset,
+ page_offset + chunk + skip);
+ if (!err) {
+ if (buffer)
+ memcpy(data + skip, buffer + buffer_pos, chunk);
+ err =
+ mapping->a_ops->commit_write(fp, page, page_offset,
+ page_offset + chunk +
+ skip);
+ }
+ unlock_page(page);
+ reiserfs_put_page(page);
+ buffer_pos += chunk;
+ file_pos += chunk;
+ skip = 0;
+ if (err || buffer_size == 0 || !buffer)
+ break;
+ }
+
+ /* We can't mark the inode dirty if it's not hashed. This is the case
+ * when we're inheriting the default ACL. If we dirty it, the inode
+ * gets marked dirty, but won't (ever) make it onto the dirty list until
+ * it's synced explicitly to clear I_DIRTY. This is bad. */
+ if (!hlist_unhashed(&inode->i_hash)) {
+ inode->i_ctime = CURRENT_TIME_SEC;
+ mark_inode_dirty(inode);
}
- unlock_page (page);
- reiserfs_put_page (page);
- buffer_pos += chunk;
- file_pos += chunk;
- skip = 0;
- if (err || buffer_size == 0 || !buffer)
- break;
- }
-
- /* We can't mark the inode dirty if it's not hashed. This is the case
- * when we're inheriting the default ACL. If we dirty it, the inode
- * gets marked dirty, but won't (ever) make it onto the dirty list until
- * it's synced explicitly to clear I_DIRTY. This is bad. */
- if (!hlist_unhashed(&inode->i_hash)) {
- inode->i_ctime = CURRENT_TIME_SEC;
- mark_inode_dirty (inode);
- }
-
-out_filp:
- up (&xinode->i_sem);
- fput(fp);
-
-out:
- return err;
+
+ out_filp:
+ up(&xinode->i_sem);
+ fput(fp);
+
+ out:
+ return err;
}
/*
* inode->i_sem: down
*/
int
-reiserfs_xattr_get (const struct inode *inode, const char *name, void *buffer,
- size_t buffer_size)
+reiserfs_xattr_get(const struct inode *inode, const char *name, void *buffer,
+ size_t buffer_size)
{
- ssize_t err = 0;
- struct file *fp;
- size_t isize;
- size_t file_pos = 0;
- size_t buffer_pos = 0;
- struct page *page;
- struct inode *xinode;
- __u32 hash = 0;
-
- if (name == NULL)
- return -EINVAL;
-
- /* We can't have xattrs attached to v1 items since they don't have
- * generation numbers */
- if (get_inode_sd_version (inode) == STAT_DATA_V1)
- return -EOPNOTSUPP;
-
- fp = open_xa_file (inode, name, FL_READONLY);
- if (IS_ERR (fp)) {
- err = PTR_ERR (fp);
- goto out;
- }
-
- xinode = fp->f_dentry->d_inode;
- isize = xinode->i_size;
- REISERFS_I(inode)->i_flags |= i_has_xattr_dir;
-
- /* Just return the size needed */
- if (buffer == NULL) {
- err = isize - sizeof (struct reiserfs_xattr_header);
- goto out_dput;
- }
-
- if (buffer_size < isize - sizeof (struct reiserfs_xattr_header)) {
- err = -ERANGE;
- goto out_dput;
- }
-
- while (file_pos < isize) {
- size_t chunk;
- char *data;
- size_t skip = 0;
- if (isize - file_pos > PAGE_CACHE_SIZE)
- chunk = PAGE_CACHE_SIZE;
- else
- chunk = isize - file_pos;
-
- page = reiserfs_get_page (xinode, file_pos >> PAGE_CACHE_SHIFT);
- if (IS_ERR (page)) {
- err = PTR_ERR (page);
- goto out_dput;
- }
-
- lock_page (page);
- data = page_address (page);
- if (file_pos == 0) {
- struct reiserfs_xattr_header *rxh =
- (struct reiserfs_xattr_header *)data;
- skip = file_pos = sizeof (struct reiserfs_xattr_header);
- chunk -= skip;
- /* Magic doesn't match up.. */
- if (rxh->h_magic != cpu_to_le32 (REISERFS_XATTR_MAGIC)) {
- unlock_page (page);
- reiserfs_put_page (page);
- reiserfs_warning (inode->i_sb, "Invalid magic for xattr (%s) "
- "associated with %k", name,
- INODE_PKEY (inode));
- err = -EIO;
- goto out_dput;
- }
- hash = le32_to_cpu (rxh->h_hash);
- }
- memcpy (buffer + buffer_pos, data + skip, chunk);
- unlock_page (page);
- reiserfs_put_page (page);
- file_pos += chunk;
- buffer_pos += chunk;
- skip = 0;
- }
- err = isize - sizeof (struct reiserfs_xattr_header);
-
- if (xattr_hash (buffer, isize - sizeof (struct reiserfs_xattr_header)) != hash) {
- reiserfs_warning (inode->i_sb, "Invalid hash for xattr (%s) associated "
- "with %k", name, INODE_PKEY (inode));
- err = -EIO;
- }
-
-out_dput:
- fput(fp);
-
-out:
- return err;
+ ssize_t err = 0;
+ struct file *fp;
+ size_t isize;
+ size_t file_pos = 0;
+ size_t buffer_pos = 0;
+ struct page *page;
+ struct inode *xinode;
+ __u32 hash = 0;
+
+ if (name == NULL)
+ return -EINVAL;
+
+ /* We can't have xattrs attached to v1 items since they don't have
+ * generation numbers */
+ if (get_inode_sd_version(inode) == STAT_DATA_V1)
+ return -EOPNOTSUPP;
+
+ fp = open_xa_file(inode, name, FL_READONLY);
+ if (IS_ERR(fp)) {
+ err = PTR_ERR(fp);
+ goto out;
+ }
+
+ xinode = fp->f_dentry->d_inode;
+ isize = xinode->i_size;
+ REISERFS_I(inode)->i_flags |= i_has_xattr_dir;
+
+ /* Just return the size needed */
+ if (buffer == NULL) {
+ err = isize - sizeof(struct reiserfs_xattr_header);
+ goto out_dput;
+ }
+
+ if (buffer_size < isize - sizeof(struct reiserfs_xattr_header)) {
+ err = -ERANGE;
+ goto out_dput;
+ }
+
+ while (file_pos < isize) {
+ size_t chunk;
+ char *data;
+ size_t skip = 0;
+ if (isize - file_pos > PAGE_CACHE_SIZE)
+ chunk = PAGE_CACHE_SIZE;
+ else
+ chunk = isize - file_pos;
+
+ page = reiserfs_get_page(xinode, file_pos >> PAGE_CACHE_SHIFT);
+ if (IS_ERR(page)) {
+ err = PTR_ERR(page);
+ goto out_dput;
+ }
+
+ lock_page(page);
+ data = page_address(page);
+ if (file_pos == 0) {
+ struct reiserfs_xattr_header *rxh =
+ (struct reiserfs_xattr_header *)data;
+ skip = file_pos = sizeof(struct reiserfs_xattr_header);
+ chunk -= skip;
+ /* Magic doesn't match up.. */
+ if (rxh->h_magic != cpu_to_le32(REISERFS_XATTR_MAGIC)) {
+ unlock_page(page);
+ reiserfs_put_page(page);
+ reiserfs_warning(inode->i_sb,
+ "Invalid magic for xattr (%s) "
+ "associated with %k", name,
+ INODE_PKEY(inode));
+ err = -EIO;
+ goto out_dput;
+ }
+ hash = le32_to_cpu(rxh->h_hash);
+ }
+ memcpy(buffer + buffer_pos, data + skip, chunk);