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Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Browse source 
Pull UDF fixes and cleanups from Jan Kara:
 "The contains some small fixes and improvements in error handling for
  UDF.

  Bundled is also one ext3 coding style fix and a fix in quota
  documentation"

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  udf: fix udf_load_pvoldesc()
  udf: remove double err declaration in udf_file_write_iter()
  UDF: support NFSv2 export
  fs: ext3: super: fixed a space coding style issue
  quota: Update documentation
  udf: Return error from udf_find_entry()
  udf: Make udf_get_filename() return error instead of 0 length file name
  udf: bug on exotic flag in udf_get_filename()
  udf: improve error management in udf_CS0toNLS()
  udf: improve error management in udf_CS0toUTF8()
  udf: unicode: update function name in comments
  udf: remove unnecessary test in udf_build_ustr_exact()
  udf: Return -ENOMEM when allocation fails in udf_get_filename()
This commit is contained in:
Linus Torvalds 2015-06-24 20:07:10 -07:00
commit a7296b49fb
8 changed files with 124 additions and 60 deletions
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3
Documentation/filesystems/quota.txt
View file

@ -32,6 +32,9 @@ The interface uses generic netlink framework (see
http://lwn.net/Articles/208755/ and http://people.suug.ch/~tgr/libnl/ for more
details about this layer). The name of the quota generic netlink interface
is "VFS_DQUOT". Definitions of constants below are in <linux/quota.h>.
Since the quota netlink protocol is not namespace aware, quota netlink messages
are sent only in initial network namespace.
Currently, the interface supports only one message type QUOTA_NL_C_WARNING.
This command is used to send a notification about any of the above mentioned
events. Each message has six attributes. These are (type of the argument is

2
fs/udf/dir.c
View file

@ -168,7 +168,7 @@ static int udf_readdir(struct file *file, struct dir_context *ctx)
}
flen = udf_get_filename(sb, nameptr, lfi, fname, UDF_NAME_LEN);
if (!flen)
if (flen < 0)
continue;
tloc = lelb_to_cpu(cfi.icb.extLocation);

2
fs/udf/file.c
View file

@ -152,8 +152,6 @@ static ssize_t udf_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
mutex_unlock(&inode->i_mutex);
if (retval > 0) {
ssize_t err;
mark_inode_dirty(inode);
err = generic_write_sync(file, iocb->ki_pos - retval, retval);
if (err < 0)

83
fs/udf/namei.c
View file

@ -138,6 +138,25 @@ int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi,
return 0;
}
/**
* udf_find_entry - find entry in given directory.
*
* @dir: directory inode to search in
* @child: qstr of the name
* @fibh: buffer head / inode with file identifier descriptor we found
* @cfi: found file identifier descriptor with given name
*
* This function searches in the directory @dir for a file name @child. When
* found, @fibh points to the buffer head(s) (bh is NULL for in ICB
* directories) containing the file identifier descriptor (FID). In that case
* the function returns pointer to the FID in the buffer or inode - but note
* that FID may be split among two buffers (blocks) so accessing it via that
* pointer isn't easily possible. This pointer can be used only as an iterator
* for other directory manipulation functions. For inspection of the FID @cfi
* can be used - the found FID is copied there.
*
* Returns pointer to FID, NULL when nothing found, or error code.
*/
static struct fileIdentDesc *udf_find_entry(struct inode *dir,
const struct qstr *child,
struct udf_fileident_bh *fibh,
@ -167,8 +186,11 @@ static struct fileIdentDesc *udf_find_entry(struct inode *dir,
fibh->soffset = fibh->eoffset = f_pos & (sb->s_blocksize - 1);
if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
if (inode_bmap(dir, f_pos >> sb->s_blocksize_bits, &epos,
&eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30))
&eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) {
fi = ERR_PTR(-EIO);
goto out_err;
}
block = udf_get_lb_pblock(sb, &eloc, offset);
if ((++offset << sb->s_blocksize_bits) < elen) {
if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
@ -179,19 +201,25 @@ static struct fileIdentDesc *udf_find_entry(struct inode *dir,
offset = 0;
fibh->sbh = fibh->ebh = udf_tread(sb, block);
if (!fibh->sbh)
if (!fibh->sbh) {
fi = ERR_PTR(-EIO);
goto out_err;
}
}
fname = kmalloc(UDF_NAME_LEN, GFP_NOFS);
if (!fname)
if (!fname) {
fi = ERR_PTR(-ENOMEM);
goto out_err;
}
while (f_pos < size) {
fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
&elen, &offset);
if (!fi)
if (!fi) {
fi = ERR_PTR(-EIO);
goto out_err;
}
liu = le16_to_cpu(cfi->lengthOfImpUse);
lfi = cfi->lengthFileIdent;
@ -234,12 +262,17 @@ static struct fileIdentDesc *udf_find_entry(struct inode *dir,
continue;
flen = udf_get_filename(sb, nameptr, lfi, fname, UDF_NAME_LEN);
if (flen && udf_match(flen, fname, child->len, child->name))
if (flen < 0) {
fi = ERR_PTR(flen);
goto out_err;
}
if (udf_match(flen, fname, child->len, child->name))
goto out_ok;
}
out_err:
fi = NULL;
out_err:
if (fibh->sbh != fibh->ebh)
brelse(fibh->ebh);
brelse(fibh->sbh);
@ -256,6 +289,7 @@ static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
struct inode *inode = NULL;
struct fileIdentDesc cfi;
struct udf_fileident_bh fibh;
struct fileIdentDesc *fi;
if (dentry->d_name.len > UDF_NAME_LEN - 2)
return ERR_PTR(-ENAMETOOLONG);
@ -275,7 +309,11 @@ static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
} else
#endif /* UDF_RECOVERY */
if (udf_find_entry(dir, &dentry->d_name, &fibh, &cfi)) {
fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
if (IS_ERR(fi))
return ERR_CAST(fi);
if (fi) {
struct kernel_lb_addr loc;
if (fibh.sbh != fibh.ebh)
@ -774,8 +812,11 @@ static int udf_rmdir(struct inode *dir, struct dentry *dentry)
retval = -ENOENT;
fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
if (!fi)
if (IS_ERR_OR_NULL(fi)) {
if (fi)
retval = PTR_ERR(fi);
goto out;
}
retval = -EIO;
tloc = lelb_to_cpu(cfi.icb.extLocation);
@ -817,8 +858,12 @@ static int udf_unlink(struct inode *dir, struct dentry *dentry)
retval = -ENOENT;
fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
if (!fi)
if (IS_ERR_OR_NULL(fi)) {
if (fi)
retval = PTR_ERR(fi);
goto out;
}
retval = -EIO;
tloc = lelb_to_cpu(cfi.icb.extLocation);
@ -1049,25 +1094,31 @@ static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
struct udf_inode_info *old_iinfo = UDF_I(old_inode);
ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
if (ofi) {
if (IS_ERR(ofi)) {
retval = PTR_ERR(ofi);
goto end_rename;
}
if (ofibh.sbh != ofibh.ebh)
brelse(ofibh.ebh);
brelse(ofibh.sbh);
}
tloc = lelb_to_cpu(ocfi.icb.extLocation);
if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0)
!= old_inode->i_ino)
goto end_rename;
nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi);
if (nfi) {
if (!new_inode) {
if (IS_ERR(nfi)) {
retval = PTR_ERR(nfi);
goto end_rename;
}
if (nfi && !new_inode) {
if (nfibh.sbh != nfibh.ebh)
brelse(nfibh.ebh);
brelse(nfibh.sbh);
nfi = NULL;
}
}
if (S_ISDIR(old_inode->i_mode)) {
int offset = udf_ext0_offset(old_inode);
@ -1221,7 +1272,7 @@ static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block,
static struct dentry *udf_fh_to_dentry(struct super_block *sb,
struct fid *fid, int fh_len, int fh_type)
{
if ((fh_len != 3 && fh_len != 5) ||
if (fh_len < 3 ||
(fh_type != FILEID_UDF_WITH_PARENT &&
fh_type != FILEID_UDF_WITHOUT_PARENT))
return NULL;
@ -1233,7 +1284,7 @@ static struct dentry *udf_fh_to_dentry(struct super_block *sb,
static struct dentry *udf_fh_to_parent(struct super_block *sb,
struct fid *fid, int fh_len, int fh_type)
{
if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT)
if (fh_len < 5 || fh_type != FILEID_UDF_WITH_PARENT)
return NULL;
return udf_nfs_get_inode(sb, fid->udf.parent_block,

18
fs/udf/super.c
View file

@ -927,17 +927,23 @@ static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
#endif
}
if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
if (udf_CS0toUTF8(outstr, instr)) {
if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) {
ret = udf_CS0toUTF8(outstr, instr);
if (ret < 0)
goto out_bh;
strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
outstr->u_len > 31 ? 31 : outstr->u_len);
udf_debug("volIdent[] = '%s'\n",
UDF_SB(sb)->s_volume_ident);
udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident);
}
if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
if (udf_CS0toUTF8(outstr, instr))
if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128)) {
ret = udf_CS0toUTF8(outstr, instr);
if (ret < 0)
goto out_bh;
udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
}
ret = 0;
out_bh:

3
fs/udf/symlink.c
View file

@ -82,6 +82,9 @@ static int udf_pc_to_char(struct super_block *sb, unsigned char *from,
comp_len = udf_get_filename(sb, pc->componentIdent,
pc->lengthComponentIdent,
p, tolen);
if (comp_len < 0)
return comp_len;
p += comp_len;
tolen -= comp_len;
if (tolen == 0)

49
fs/udf/unicode.c
View file

@ -68,21 +68,16 @@ int udf_build_ustr(struct ustr *dest, dstring *ptr, int size)
/*
* udf_build_ustr_exact
*/
static int udf_build_ustr_exact(struct ustr *dest, dstring *ptr, int exactsize)
static void udf_build_ustr_exact(struct ustr *dest, dstring *ptr, int exactsize)
{
if ((!dest) || (!ptr) || (!exactsize))
return -1;
memset(dest, 0, sizeof(struct ustr));
dest->u_cmpID = ptr[0];
dest->u_len = exactsize - 1;
memcpy(dest->u_name, ptr + 1, exactsize - 1);
return 0;
}
/*
* udf_ocu_to_utf8
* udf_CS0toUTF8
*
* PURPOSE
* Convert OSTA Compressed Unicode to the UTF-8 equivalent.
@ -94,7 +89,7 @@ static int udf_build_ustr_exact(struct ustr *dest, dstring *ptr, int exactsize)
* both of type "struct ustr *"
*
* POST-CONDITIONS
* <return> Zero on success.
* <return> >= 0 on success.
*
* HISTORY
* November 12, 1997 - Andrew E. Mileski
@ -117,7 +112,7 @@ int udf_CS0toUTF8(struct ustr *utf_o, const struct ustr *ocu_i)
memset(utf_o, 0, sizeof(struct ustr));
pr_err("unknown compression code (%d) stri=%s\n",
cmp_id, ocu_i->u_name);
return 0;
return -EINVAL;
}
ocu = ocu_i->u_name;
@ -154,7 +149,7 @@ int udf_CS0toUTF8(struct ustr *utf_o, const struct ustr *ocu_i)
/*
*
* udf_utf8_to_ocu
* udf_UTF8toCS0
*
* PURPOSE
* Convert UTF-8 to the OSTA Compressed Unicode equivalent.
@ -270,7 +265,7 @@ static int udf_CS0toNLS(struct nls_table *nls, struct ustr *utf_o,
memset(utf_o, 0, sizeof(struct ustr));
pr_err("unknown compression code (%d) stri=%s\n",
cmp_id, ocu_i->u_name);
return 0;
return -EINVAL;
}
ocu = ocu_i->u_name;
@ -338,43 +333,51 @@ int udf_get_filename(struct super_block *sb, uint8_t *sname, int slen,
uint8_t *dname, int dlen)
{
struct ustr *filename, *unifilename;
int len = 0;
int ret;
if (!slen)
return -EIO;
filename = kmalloc(sizeof(struct ustr), GFP_NOFS);
if (!filename)
return 0;
return -ENOMEM;
unifilename = kmalloc(sizeof(struct ustr), GFP_NOFS);
if (!unifilename)
if (!unifilename) {
ret = -ENOMEM;
goto out1;
}
if (udf_build_ustr_exact(unifilename, sname, slen))
goto out2;
udf_build_ustr_exact(unifilename, sname, slen);
if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) {
if (!udf_CS0toUTF8(filename, unifilename)) {
ret = udf_CS0toUTF8(filename, unifilename);
if (ret < 0) {
udf_debug("Failed in udf_get_filename: sname = %s\n",
sname);
goto out2;
}
} else if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) {
if (!udf_CS0toNLS(UDF_SB(sb)->s_nls_map, filename,
unifilename)) {
ret = udf_CS0toNLS(UDF_SB(sb)->s_nls_map, filename,
unifilename);
if (ret < 0) {
udf_debug("Failed in udf_get_filename: sname = %s\n",
sname);
goto out2;
}
} else
goto out2;
BUG();
len = udf_translate_to_linux(dname, dlen,
ret = udf_translate_to_linux(dname, dlen,
filename->u_name, filename->u_len,
unifilename->u_name, unifilename->u_len);
/* Zero length filename isn't valid... */
if (ret == 0)
ret = -EINVAL;
out2:
kfree(unifilename);
out1:
kfree(filename);
return len;
return ret;
}
int udf_put_filename(struct super_block *sb, const uint8_t *sname,