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Diffstat (limited to 'fs/udf/namei.c')
-rw-r--r--fs/udf/namei.c656
1 files changed, 344 insertions, 312 deletions
diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index 112a5fb0b27..9737cba1357 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -27,13 +27,13 @@
#include <linux/errno.h>
#include <linux/mm.h>
#include <linux/slab.h>
-#include <linux/quotaops.h>
-#include <linux/smp_lock.h>
#include <linux/buffer_head.h>
#include <linux/sched.h>
+#include <linux/crc-itu-t.h>
+#include <linux/exportfs.h>
-static inline int udf_match(int len1, const char *name1, int len2,
- const char *name2)
+static inline int udf_match(int len1, const unsigned char *name1, int len2,
+ const unsigned char *name2)
{
if (len1 != len2)
return 0;
@@ -45,7 +45,7 @@ int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi,
struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh,
uint8_t *impuse, uint8_t *fileident)
{
- uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(tag);
+ uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(struct tag);
uint16_t crc;
int offset;
uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse);
@@ -97,25 +97,23 @@ int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi,
memset(fibh->ebh->b_data, 0x00, padlen + offset);
}
- crc = udf_crc((uint8_t *)cfi + sizeof(tag),
- sizeof(struct fileIdentDesc) - sizeof(tag), 0);
+ crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag),
+ sizeof(struct fileIdentDesc) - sizeof(struct tag));
if (fibh->sbh == fibh->ebh) {
- crc = udf_crc((uint8_t *)sfi->impUse,
- crclen + sizeof(tag) -
- sizeof(struct fileIdentDesc), crc);
+ crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
+ crclen + sizeof(struct tag) -
+ sizeof(struct fileIdentDesc));
} else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) {
- crc = udf_crc(fibh->ebh->b_data +
+ crc = crc_itu_t(crc, fibh->ebh->b_data +
sizeof(struct fileIdentDesc) +
fibh->soffset,
- crclen + sizeof(tag) -
- sizeof(struct fileIdentDesc),
- crc);
+ crclen + sizeof(struct tag) -
+ sizeof(struct fileIdentDesc));
} else {
- crc = udf_crc((uint8_t *)sfi->impUse,
- -fibh->soffset - sizeof(struct fileIdentDesc),
- crc);
- crc = udf_crc(fibh->ebh->b_data, fibh->eoffset, crc);
+ crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
+ -fibh->soffset - sizeof(struct fileIdentDesc));
+ crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset);
}
cfi->descTag.descCRC = cpu_to_le16(crc);
@@ -142,62 +140,58 @@ int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi,
}
static struct fileIdentDesc *udf_find_entry(struct inode *dir,
- struct dentry *dentry,
+ const struct qstr *child,
struct udf_fileident_bh *fibh,
struct fileIdentDesc *cfi)
{
struct fileIdentDesc *fi = NULL;
loff_t f_pos;
int block, flen;
- char fname[UDF_NAME_LEN];
- char *nameptr;
+ unsigned char *fname = NULL;
+ unsigned char *nameptr;
uint8_t lfi;
uint16_t liu;
loff_t size;
- kernel_lb_addr eloc;
+ struct kernel_lb_addr eloc;
uint32_t elen;
sector_t offset;
struct extent_position epos = {};
struct udf_inode_info *dinfo = UDF_I(dir);
+ int isdotdot = child->len == 2 &&
+ child->name[0] == '.' && child->name[1] == '.';
size = udf_ext0_offset(dir) + dir->i_size;
f_pos = udf_ext0_offset(dir);
+ fibh->sbh = fibh->ebh = NULL;
fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
- if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
- fibh->sbh = fibh->ebh = NULL;
- else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
- &epos, &eloc, &elen, &offset) ==
- (EXT_RECORDED_ALLOCATED >> 30)) {
- block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
+ if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
+ if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
+ &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30))
+ goto out_err;
+ block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
- epos.offset -= sizeof(short_ad);
+ epos.offset -= sizeof(struct short_ad);
else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
- epos.offset -= sizeof(long_ad);
+ epos.offset -= sizeof(struct long_ad);
} else
offset = 0;
fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
- if (!fibh->sbh) {
- brelse(epos.bh);
- return NULL;
- }
- } else {
- brelse(epos.bh);
- return NULL;
+ if (!fibh->sbh)
+ goto out_err;
}
+ fname = kmalloc(UDF_NAME_LEN, GFP_NOFS);
+ if (!fname)
+ goto out_err;
+
while (f_pos < size) {
fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
&elen, &offset);
- if (!fi) {
- if (fibh->sbh != fibh->ebh)
- brelse(fibh->ebh);
- brelse(fibh->sbh);
- brelse(epos.bh);
- return NULL;
- }
+ if (!fi)
+ goto out_err;
liu = le16_to_cpu(cfi->lengthOfImpUse);
lfi = cfi->lengthFileIdent;
@@ -232,60 +226,32 @@ static struct fileIdentDesc *udf_find_entry(struct inode *dir,
continue;
}
+ if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) &&
+ isdotdot)
+ goto out_ok;
+
if (!lfi)
continue;
flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi);
- if (flen && udf_match(flen, fname, dentry->d_name.len,
- dentry->d_name.name)) {
- brelse(epos.bh);
- return fi;
- }
+ if (flen && udf_match(flen, fname, child->len, child->name))
+ goto out_ok;
}
+out_err:
+ fi = NULL;
if (fibh->sbh != fibh->ebh)
brelse(fibh->ebh);
brelse(fibh->sbh);
+out_ok:
brelse(epos.bh);
+ kfree(fname);
- return NULL;
+ return fi;
}
-/*
- * udf_lookup
- *
- * PURPOSE
- * Look-up the inode for a given name.
- *
- * DESCRIPTION
- * Required - lookup_dentry() will return -ENOTDIR if this routine is not
- * available for a directory. The filesystem is useless if this routine is
- * not available for at least the filesystem's root directory.
- *
- * This routine is passed an incomplete dentry - it must be completed by
- * calling d_add(dentry, inode). If the name does not exist, then the
- * specified inode must be set to null. An error should only be returned
- * when the lookup fails for a reason other than the name not existing.
- * Note that the directory inode semaphore is held during the call.
- *
- * Refer to lookup_dentry() in fs/namei.c
- * lookup_dentry() -> lookup() -> real_lookup() -> .
- *
- * PRE-CONDITIONS
- * dir Pointer to inode of parent directory.
- * dentry Pointer to dentry to complete.
- * nd Pointer to lookup nameidata
- *
- * POST-CONDITIONS
- * <return> Zero on success.
- *
- * HISTORY
- * July 1, 1997 - Andrew E. Mileski
- * Written, tested, and released.
- */
-
static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
- struct nameidata *nd)
+ unsigned int flags)
{
struct inode *inode = NULL;
struct fileIdentDesc cfi;
@@ -294,11 +260,10 @@ static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
if (dentry->d_name.len > UDF_NAME_LEN - 2)
return ERR_PTR(-ENAMETOOLONG);
- lock_kernel();
#ifdef UDF_RECOVERY
/* temporary shorthand for specifying files by inode number */
if (!strncmp(dentry->d_name.name, ".B=", 3)) {
- kernel_lb_addr lb = {
+ struct kernel_lb_addr lb = {
.logicalBlockNum = 0,
.partitionReferenceNum =
simple_strtoul(dentry->d_name.name + 3,
@@ -306,27 +271,26 @@ static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
};
inode = udf_iget(dir->i_sb, lb);
if (!inode) {
- unlock_kernel();
return ERR_PTR(-EACCES);
}
} else
#endif /* UDF_RECOVERY */
- if (udf_find_entry(dir, dentry, &fibh, &cfi)) {
+ if (udf_find_entry(dir, &dentry->d_name, &fibh, &cfi)) {
+ struct kernel_lb_addr loc;
+
if (fibh.sbh != fibh.ebh)
brelse(fibh.ebh);
brelse(fibh.sbh);
- inode = udf_iget(dir->i_sb, lelb_to_cpu(cfi.icb.extLocation));
+ loc = lelb_to_cpu(cfi.icb.extLocation);
+ inode = udf_iget(dir->i_sb, &loc);
if (!inode) {
- unlock_kernel();
return ERR_PTR(-EACCES);
}
}
- unlock_kernel();
- d_add(dentry, inode);
- return NULL;
+ return d_splice_alias(inode, dentry);
}
static struct fileIdentDesc *udf_add_entry(struct inode *dir,
@@ -336,32 +300,37 @@ static struct fileIdentDesc *udf_add_entry(struct inode *dir,
{
struct super_block *sb = dir->i_sb;
struct fileIdentDesc *fi = NULL;
- char name[UDF_NAME_LEN], fname[UDF_NAME_LEN];
+ unsigned char *name = NULL;
int namelen;
loff_t f_pos;
- int flen;
- char *nameptr;
loff_t size = udf_ext0_offset(dir) + dir->i_size;
int nfidlen;
uint8_t lfi;
uint16_t liu;
int block;
- kernel_lb_addr eloc;
- uint32_t elen;
+ struct kernel_lb_addr eloc;
+ uint32_t elen = 0;
sector_t offset;
struct extent_position epos = {};
struct udf_inode_info *dinfo;
+ fibh->sbh = fibh->ebh = NULL;
+ name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
+ if (!name) {
+ *err = -ENOMEM;
+ goto out_err;
+ }
+
if (dentry) {
if (!dentry->d_name.len) {
*err = -EINVAL;
- return NULL;
+ goto out_err;
}
namelen = udf_put_filename(sb, dentry->d_name.name, name,
dentry->d_name.len);
if (!namelen) {
*err = -ENAMETOOLONG;
- return NULL;
+ goto out_err;
}
} else {
namelen = 0;
@@ -373,33 +342,30 @@ static struct fileIdentDesc *udf_add_entry(struct inode *dir,
fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
dinfo = UDF_I(dir);
- if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
- fibh->sbh = fibh->ebh = NULL;
- else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
- &epos, &eloc, &elen, &offset) ==
- (EXT_RECORDED_ALLOCATED >> 30)) {
- block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
+ if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
+ if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
+ &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) {
+ block = udf_get_lb_pblock(dir->i_sb,
+ &dinfo->i_location, 0);
+ fibh->soffset = fibh->eoffset = sb->s_blocksize;
+ goto add;
+ }
+ block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
- epos.offset -= sizeof(short_ad);
+ epos.offset -= sizeof(struct short_ad);
else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
- epos.offset -= sizeof(long_ad);
+ epos.offset -= sizeof(struct long_ad);
} else
offset = 0;
fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
if (!fibh->sbh) {
- brelse(epos.bh);
*err = -EIO;
- return NULL;
+ goto out_err;
}
block = dinfo->i_location.logicalBlockNum;
- } else {
- block = udf_get_lb_pblock(dir->i_sb, dinfo->i_location, 0);
- fibh->sbh = fibh->ebh = NULL;
- fibh->soffset = fibh->eoffset = sb->s_blocksize;
- goto add;
}
while (f_pos < size) {
@@ -407,41 +373,16 @@ static struct fileIdentDesc *udf_add_entry(struct inode *dir,
&elen, &offset);
if (!fi) {
- if (fibh->sbh != fibh->ebh)
- brelse(fibh->ebh);
- brelse(fibh->sbh);
- brelse(epos.bh);
*err = -EIO;
- return NULL;
+ goto out_err;
}
liu = le16_to_cpu(cfi->lengthOfImpUse);
lfi = cfi->lengthFileIdent;
- if (fibh->sbh == fibh->ebh)
- nameptr = fi->fileIdent + liu;
- else {
- int poffset; /* Unpaded ending offset */
-
- poffset = fibh->soffset + sizeof(struct fileIdentDesc) +
- liu + lfi;
-
- if (poffset >= lfi)
- nameptr = (char *)(fibh->ebh->b_data +
- poffset - lfi);
- else {
- nameptr = fname;
- memcpy(nameptr, fi->fileIdent + liu,
- lfi - poffset);
- memcpy(nameptr + lfi - poffset,
- fibh->ebh->b_data, poffset);
- }
- }
-
if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
if (((sizeof(struct fileIdentDesc) +
liu + lfi + 3) & ~3) == nfidlen) {
- brelse(epos.bh);
cfi->descTag.tagSerialNum = cpu_to_le16(1);
cfi->fileVersionNum = cpu_to_le16(1);
cfi->fileCharacteristics = 0;
@@ -449,38 +390,16 @@ static struct fileIdentDesc *udf_add_entry(struct inode *dir,
cfi->lengthOfImpUse = cpu_to_le16(0);
if (!udf_write_fi(dir, cfi, fi, fibh, NULL,
name))
- return fi;
+ goto out_ok;
else {
*err = -EIO;
- return NULL;
+ goto out_err;
}
}
}
-
- if (!lfi || !dentry)
- continue;
-
- flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi);
- if (flen && udf_match(flen, fname, dentry->d_name.len,
- dentry->d_name.name)) {
- if (fibh->sbh != fibh->ebh)
- brelse(fibh->ebh);
- brelse(fibh->sbh);
- brelse(epos.bh);
- *err = -EEXIST;
- return NULL;
- }
}
add:
- if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
- elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1);
- if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
- epos.offset -= sizeof(short_ad);
- else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
- epos.offset -= sizeof(long_ad);
- udf_write_aext(dir, &epos, eloc, elen, 1);
- }
f_pos += nfidlen;
if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB &&
@@ -496,13 +415,14 @@ add:
fibh->sbh = fibh->ebh =
udf_expand_dir_adinicb(dir, &block, err);
if (!fibh->sbh)
- return NULL;
+ goto out_err;
epos.block = dinfo->i_location;
epos.offset = udf_file_entry_alloc_offset(dir);
/* Load extent udf_expand_dir_adinicb() has created */
udf_current_aext(dir, &epos, &eloc, &elen, 1);
}
+ /* Entry fits into current block? */
if (sb->s_blocksize - fibh->eoffset >= nfidlen) {
fibh->soffset = fibh->eoffset;
fibh->eoffset += nfidlen;
@@ -526,6 +446,16 @@ add:
(fibh->sbh->b_data + fibh->soffset);
}
} else {
+ /* Round up last extent in the file */
+ elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1);
+ if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
+ epos.offset -= sizeof(struct short_ad);
+ else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
+ epos.offset -= sizeof(struct long_ad);
+ udf_write_aext(dir, &epos, &eloc, elen, 1);
+ dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize
+ - 1) & ~(sb->s_blocksize - 1);
+
fibh->soffset = fibh->eoffset - sb->s_blocksize;
fibh->eoffset += nfidlen - sb->s_blocksize;
if (fibh->sbh != fibh->ebh) {
@@ -537,20 +467,21 @@ add:
dir->i_sb->s_blocksize_bits);
fibh->ebh = udf_bread(dir,
f_pos >> dir->i_sb->s_blocksize_bits, 1, err);
- if (!fibh->ebh) {
- brelse(epos.bh);
- brelse(fibh->sbh);
- return NULL;
- }
+ if (!fibh->ebh)
+ goto out_err;
+ /* Extents could have been merged, invalidate our position */
+ brelse(epos.bh);
+ epos.bh = NULL;
+ epos.block = dinfo->i_location;
+ epos.offset = udf_file_entry_alloc_offset(dir);
if (!fibh->soffset) {
- if (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
- (EXT_RECORDED_ALLOCATED >> 30)) {
- block = eloc.logicalBlockNum + ((elen - 1) >>
+ /* Find the freshly allocated block */
+ while (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
+ (EXT_RECORDED_ALLOCATED >> 30))
+ ;
+ block = eloc.logicalBlockNum + ((elen - 1) >>
dir->i_sb->s_blocksize_bits);
- } else
- block++;
-
brelse(fibh->sbh);
fibh->sbh = fibh->ebh;
fi = (struct fileIdentDesc *)(fibh->sbh->b_data);
@@ -564,28 +495,47 @@ add:
memset(cfi, 0, sizeof(struct fileIdentDesc));
if (UDF_SB(sb)->s_udfrev >= 0x0200)
udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block,
- sizeof(tag));
+ sizeof(struct tag));
else
udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block,
- sizeof(tag));
+ sizeof(struct tag));
cfi->fileVersionNum = cpu_to_le16(1);
cfi->lengthFileIdent = namelen;
cfi->lengthOfImpUse = cpu_to_le16(0);
if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) {
- brelse(epos.bh);
dir->i_size += nfidlen;
if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
dinfo->i_lenAlloc += nfidlen;
+ else {
+ /* Find the last extent and truncate it to proper size */
+ while (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
+ (EXT_RECORDED_ALLOCATED >> 30))
+ ;
+ elen -= dinfo->i_lenExtents - dir->i_size;
+ if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
+ epos.offset -= sizeof(struct short_ad);
+ else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
+ epos.offset -= sizeof(struct long_ad);
+ udf_write_aext(dir, &epos, &eloc, elen, 1);
+ dinfo->i_lenExtents = dir->i_size;
+ }
+
mark_inode_dirty(dir);
- return fi;
+ goto out_ok;
} else {
- brelse(epos.bh);
- if (fibh->sbh != fibh->ebh)
- brelse(fibh->ebh);
- brelse(fibh->sbh);
*err = -EIO;
- return NULL;
+ goto out_err;
}
+
+out_err:
+ fi = NULL;
+ if (fibh->sbh != fibh->ebh)
+ brelse(fibh->ebh);
+ brelse(fibh->sbh);
+out_ok:
+ brelse(epos.bh);
+ kfree(name);
+ return fi;
}
static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
@@ -595,13 +545,13 @@ static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED;
if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
- memset(&(cfi->icb), 0x00, sizeof(long_ad));
+ memset(&(cfi->icb), 0x00, sizeof(struct long_ad));
return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL);
}
-static int udf_create(struct inode *dir, struct dentry *dentry, int mode,
- struct nameidata *nd)
+static int udf_create(struct inode *dir, struct dentry *dentry, umode_t mode,
+ bool excl)
{
struct udf_fileident_bh fibh;
struct inode *inode;
@@ -609,10 +559,8 @@ static int udf_create(struct inode *dir, struct dentry *dentry, int mode,
int err;
struct udf_inode_info *iinfo;
- lock_kernel();
inode = udf_new_inode(dir, mode, &err);
if (!inode) {
- unlock_kernel();
return err;
}
@@ -623,15 +571,12 @@ static int udf_create(struct inode *dir, struct dentry *dentry, int mode,
inode->i_data.a_ops = &udf_aops;
inode->i_op = &udf_file_inode_operations;
inode->i_fop = &udf_file_operations;
- inode->i_mode = mode;
mark_inode_dirty(inode);
fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
if (!fi) {
- inode->i_nlink--;
- mark_inode_dirty(inode);
+ inode_dec_link_count(inode);
iput(inode);
- unlock_kernel();
return err;
}
cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
@@ -644,13 +589,35 @@ static int udf_create(struct inode *dir, struct dentry *dentry, int mode,
if (fibh.sbh != fibh.ebh)
brelse(fibh.ebh);
brelse(fibh.sbh);
- unlock_kernel();
d_instantiate(dentry, inode);
return 0;
}
-static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode,
+static int udf_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+ struct inode *inode;
+ struct udf_inode_info *iinfo;
+ int err;
+
+ inode = udf_new_inode(dir, mode, &err);
+ if (!inode)
+ return err;
+
+ iinfo = UDF_I(inode);
+ if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
+ inode->i_data.a_ops = &udf_adinicb_aops;
+ else
+ inode->i_data.a_ops = &udf_aops;
+ inode->i_op = &udf_file_inode_operations;
+ inode->i_fop = &udf_file_operations;
+ mark_inode_dirty(inode);
+
+ d_tmpfile(dentry, inode);
+ return 0;
+}
+
+static int udf_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
dev_t rdev)
{
struct inode *inode;
@@ -662,21 +629,17 @@ static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode,
if (!old_valid_dev(rdev))
return -EINVAL;
- lock_kernel();
err = -EIO;
inode = udf_new_inode(dir, mode, &err);
if (!inode)
goto out;
iinfo = UDF_I(inode);
- inode->i_uid = current->fsuid;
init_special_inode(inode, mode, rdev);
fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
if (!fi) {
- inode->i_nlink--;
- mark_inode_dirty(inode);
+ inode_dec_link_count(inode);
iput(inode);
- unlock_kernel();
return err;
}
cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
@@ -695,11 +658,10 @@ static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode,
err = 0;
out:
- unlock_kernel();
return err;
}
-static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+static int udf_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
{
struct inode *inode;
struct udf_fileident_bh fibh;
@@ -708,13 +670,8 @@ static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode)
struct udf_inode_info *dinfo = UDF_I(dir);
struct udf_inode_info *iinfo;
- lock_kernel();
- err = -EMLINK;
- if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1)
- goto out;
-
err = -EIO;
- inode = udf_new_inode(dir, S_IFDIR, &err);
+ inode = udf_new_inode(dir, S_IFDIR | mode, &err);
if (!inode)
goto out;
@@ -723,12 +680,11 @@ static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode)
inode->i_fop = &udf_dir_operations;
fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err);
if (!fi) {
- inode->i_nlink--;
- mark_inode_dirty(inode);
+ inode_dec_link_count(inode);
iput(inode);
goto out;
}
- inode->i_nlink = 2;
+ set_nlink(inode, 2);
cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location);
*(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
@@ -737,14 +693,11 @@ static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode)
FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
brelse(fibh.sbh);
- inode->i_mode = S_IFDIR | mode;
- if (dir->i_mode & S_ISGID)
- inode->i_mode |= S_ISGID;
mark_inode_dirty(inode);
fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
if (!fi) {
- inode->i_nlink = 0;
+ clear_nlink(inode);
mark_inode_dirty(inode);
iput(inode);
goto out;
@@ -764,7 +717,6 @@ static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode)
err = 0;
out:
- unlock_kernel();
return err;
}
@@ -775,7 +727,7 @@ static int empty_dir(struct inode *dir)
loff_t f_pos;
loff_t size = udf_ext0_offset(dir) + dir->i_size;
int block;
- kernel_lb_addr eloc;
+ struct kernel_lb_addr eloc;
uint32_t elen;
sector_t offset;
struct extent_position epos = {};
@@ -789,12 +741,12 @@ static int empty_dir(struct inode *dir)
else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
&epos, &eloc, &elen, &offset) ==
(EXT_RECORDED_ALLOCATED >> 30)) {
- block = udf_get_lb_pblock(dir->i_sb, eloc, offset);
+ block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
- epos.offset -= sizeof(short_ad);
+ epos.offset -= sizeof(struct short_ad);
else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
- epos.offset -= sizeof(long_ad);
+ epos.offset -= sizeof(struct long_ad);
} else
offset = 0;
@@ -843,17 +795,16 @@ static int udf_rmdir(struct inode *dir, struct dentry *dentry)
struct inode *inode = dentry->d_inode;
struct udf_fileident_bh fibh;
struct fileIdentDesc *fi, cfi;
- kernel_lb_addr tloc;
+ struct kernel_lb_addr tloc;
retval = -ENOENT;
- lock_kernel();
- fi = udf_find_entry(dir, dentry, &fibh, &cfi);
+ fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
if (!fi)
goto out;
retval = -EIO;
tloc = lelb_to_cpu(cfi.icb.extLocation);
- if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
+ if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
goto end_rmdir;
retval = -ENOTEMPTY;
if (!empty_dir(inode))
@@ -862,9 +813,8 @@ static int udf_rmdir(struct inode *dir, struct dentry *dentry)
if (retval)
goto end_rmdir;
if (inode->i_nlink != 2)
- udf_warning(inode->i_sb, "udf_rmdir",
- "empty directory has nlink != 2 (%d)",
- inode->i_nlink);
+ udf_warn(inode->i_sb, "empty directory has nlink != 2 (%d)\n",
+ inode->i_nlink);
clear_nlink(inode);
inode->i_size = 0;
inode_dec_link_count(dir);
@@ -878,7 +828,6 @@ end_rmdir:
brelse(fibh.sbh);
out:
- unlock_kernel();
return retval;
}
@@ -889,23 +838,22 @@ static int udf_unlink(struct inode *dir, struct dentry *dentry)
struct udf_fileident_bh fibh;
struct fileIdentDesc *fi;
struct fileIdentDesc cfi;
- kernel_lb_addr tloc;
+ struct kernel_lb_addr tloc;
retval = -ENOENT;
- lock_kernel();
- fi = udf_find_entry(dir, dentry, &fibh, &cfi);
+ fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
if (!fi)
goto out;
retval = -EIO;
tloc = lelb_to_cpu(cfi.icb.extLocation);
- if (udf_get_lb_pblock(dir->i_sb, tloc, 0) != inode->i_ino)
+ if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
goto end_unlink;
if (!inode->i_nlink) {
udf_debug("Deleting nonexistent file (%lu), %d\n",
inode->i_ino, inode->i_nlink);
- inode->i_nlink = 1;
+ set_nlink(inode, 1);
}
retval = udf_delete_entry(dir, fi, &fibh, &cfi);
if (retval)
@@ -922,7 +870,6 @@ end_unlink:
brelse(fibh.sbh);
out:
- unlock_kernel();
return retval;
}
@@ -931,35 +878,40 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
{
struct inode *inode;
struct pathComponent *pc;
- char *compstart;
+ const char *compstart;
struct udf_fileident_bh fibh;
struct extent_position epos = {};
int eoffset, elen = 0;
struct fileIdentDesc *fi;
struct fileIdentDesc cfi;
- char *ea;
+ uint8_t *ea;
int err;
int block;
- char name[UDF_NAME_LEN];
+ unsigned char *name = NULL;
int namelen;
- struct buffer_head *bh;
struct udf_inode_info *iinfo;
+ struct super_block *sb = dir->i_sb;
- lock_kernel();
- inode = udf_new_inode(dir, S_IFLNK, &err);
+ inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO, &err);
if (!inode)
goto out;
iinfo = UDF_I(inode);
- inode->i_mode = S_IFLNK | S_IRWXUGO;
+ down_write(&iinfo->i_data_sem);
+ name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
+ if (!name) {
+ err = -ENOMEM;
+ goto out_no_entry;
+ }
+
inode->i_data.a_ops = &udf_symlink_aops;
- inode->i_op = &page_symlink_inode_operations;
+ inode->i_op = &udf_symlink_inode_operations;
if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
- kernel_lb_addr eloc;
- uint32_t elen;
+ struct kernel_lb_addr eloc;
+ uint32_t bsize;
- block = udf_new_block(inode->i_sb, inode,
+ block = udf_new_block(sb, inode,
iinfo->i_location.partitionReferenceNum,
iinfo->i_location.logicalBlockNum, &err);
if (!block)
@@ -970,17 +922,17 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
eloc.logicalBlockNum = block;
eloc.partitionReferenceNum =
iinfo->i_location.partitionReferenceNum;
- elen = inode->i_sb->s_blocksize;
- iinfo->i_lenExtents = elen;
- udf_add_aext(inode, &epos, eloc, elen, 0);
+ bsize = sb->s_blocksize;
+ iinfo->i_lenExtents = bsize;
+ udf_add_aext(inode, &epos, &eloc, bsize, 0);
brelse(epos.bh);
- block = udf_get_pblock(inode->i_sb, block,
+ block = udf_get_pblock(sb, block,
iinfo->i_location.partitionReferenceNum,
0);
- epos.bh = udf_tread(inode->i_sb, block);
+ epos.bh = udf_tgetblk(sb, block);
lock_buffer(epos.bh);
- memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize);
+ memset(epos.bh->b_data, 0x00, bsize);
set_buffer_uptodate(epos.bh);
unlock_buffer(epos.bh);
mark_buffer_dirty_inode(epos.bh, inode);
@@ -988,7 +940,7 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
} else
ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
- eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode);
+ eoffset = sb->s_blocksize - udf_ext0_offset(inode);
pc = (struct pathComponent *)ea;
if (*symname == '/') {
@@ -999,7 +951,6 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
pc->componentType = 1;
pc->lengthComponentIdent = 0;
pc->componentFileVersionNum = 0;
- pc += sizeof(struct pathComponent);
elen += sizeof(struct pathComponent);
}
@@ -1011,7 +962,7 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
pc = (struct pathComponent *)(ea + elen);
- compstart = (char *)symname;
+ compstart = symname;
do {
symname++;
@@ -1029,7 +980,7 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
}
if (pc->componentType == 5) {
- namelen = udf_put_filename(inode->i_sb, compstart, name,
+ namelen = udf_put_filename(sb, compstart, name,
symname - compstart);
if (!namelen)
goto out_no_entry;
@@ -1056,28 +1007,19 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
inode->i_size = elen;
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
iinfo->i_lenAlloc = inode->i_size;
+ else
+ udf_truncate_tail_extent(inode);
mark_inode_dirty(inode);
+ up_write(&iinfo->i_data_sem);
fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
if (!fi)
goto out_no_entry;
- cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
+ cfi.icb.extLength = cpu_to_le32(sb->s_blocksize);
cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
- bh = UDF_SB(inode->i_sb)->s_lvid_bh;
- if (bh) {
- struct logicalVolIntegrityDesc *lvid =
- (struct logicalVolIntegrityDesc *)bh->b_data;
- struct logicalVolHeaderDesc *lvhd;
- uint64_t uniqueID;
- lvhd = (struct logicalVolHeaderDesc *)
- lvid->logicalVolContentsUse;
- uniqueID = le64_to_cpu(lvhd->uniqueID);
+ if (UDF_SB(inode->i_sb)->s_lvid_bh) {
*(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
- cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
- if (!(++uniqueID & 0x00000000FFFFFFFFUL))
- uniqueID += 16;
- lvhd->uniqueID = cpu_to_le64(uniqueID);
- mark_buffer_dirty(bh);
+ cpu_to_le32(lvid_get_unique_id(sb));
}
udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
@@ -1089,10 +1031,11 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
err = 0;
out:
- unlock_kernel();
+ kfree(name);
return err;
out_no_entry:
+ up_write(&iinfo->i_data_sem);
inode_dec_link_count(inode);
iput(inode);
goto out;
@@ -1105,36 +1048,16 @@ static int udf_link(struct dentry *old_dentry, struct inode *dir,
struct udf_fileident_bh fibh;
struct fileIdentDesc cfi, *fi;
int err;
- struct buffer_head *bh;
-
- lock_kernel();
- if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) {
- unlock_kernel();
- return -EMLINK;
- }
fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
if (!fi) {
- unlock_kernel();
return err;
}
cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location);
- bh = UDF_SB(inode->i_sb)->s_lvid_bh;
- if (bh) {
- struct logicalVolIntegrityDesc *lvid =
- (struct logicalVolIntegrityDesc *)bh->b_data;
- struct logicalVolHeaderDesc *lvhd;
- uint64_t uniqueID;
- lvhd = (struct logicalVolHeaderDesc *)
- (lvid->logicalVolContentsUse);
- uniqueID = le64_to_cpu(lvhd->uniqueID);
+ if (UDF_SB(inode->i_sb)->s_lvid_bh) {
*(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
- cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
- if (!(++uniqueID & 0x00000000FFFFFFFFUL))
- uniqueID += 16;
- lvhd->uniqueID = cpu_to_le64(uniqueID);
- mark_buffer_dirty(bh);
+ cpu_to_le32(lvid_get_unique_id(inode->i_sb));
}
udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
@@ -1146,9 +1069,8 @@ static int udf_link(struct dentry *old_dentry, struct inode *dir,
inc_nlink(inode);
inode->i_ctime = current_fs_time(inode->i_sb);
mark_inode_dirty(inode);
- atomic_inc(&inode->i_count);
+ ihold(inode);
d_instantiate(dentry, inode);
- unlock_kernel();
return 0;
}
@@ -1166,22 +1088,21 @@ static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
struct fileIdentDesc ocfi, ncfi;
struct buffer_head *dir_bh = NULL;
int retval = -ENOENT;
- kernel_lb_addr tloc;
+ struct kernel_lb_addr tloc;
struct udf_inode_info *old_iinfo = UDF_I(old_inode);
- lock_kernel();
- ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi);
+ ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
if (ofi) {
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)
+ 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, &nfibh, &ncfi);
+ nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi);
if (nfi) {
if (!new_inode) {
if (nfibh.sbh != nfibh.ebh)
@@ -1216,15 +1137,9 @@ static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
if (!dir_fi)
goto end_rename;
tloc = lelb_to_cpu(dir_fi->icb.extLocation);
- if (udf_get_lb_pblock(old_inode->i_sb, tloc, 0) !=
+ if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) !=
old_dir->i_ino)
goto end_rename;
-
- retval = -EMLINK;
- if (!new_inode &&
- new_dir->i_nlink >=
- (256 << sizeof(new_dir->i_nlink)) - 1)
- goto end_rename;
}
if (!nfi) {
nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi,
@@ -1245,11 +1160,11 @@ static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
*/
ncfi.fileVersionNum = ocfi.fileVersionNum;
ncfi.fileCharacteristics = ocfi.fileCharacteristics;
- memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(long_ad));
+ memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad));
udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
/* The old fid may have moved - find it again */
- ofi = udf_find_entry(old_dir, old_dentry, &ofibh, &ocfi);
+ ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
if (new_inode) {
@@ -1293,11 +1208,122 @@ end_rename:
brelse(nfibh.ebh);
brelse(nfibh.sbh);
}
- unlock_kernel();
return retval;
}
+static struct dentry *udf_get_parent(struct dentry *child)
+{
+ struct kernel_lb_addr tloc;
+ struct inode *inode = NULL;
+ struct qstr dotdot = QSTR_INIT("..", 2);
+ struct fileIdentDesc cfi;
+ struct udf_fileident_bh fibh;
+
+ if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi))
+ goto out_unlock;
+
+ if (fibh.sbh != fibh.ebh)
+ brelse(fibh.ebh);
+ brelse(fibh.sbh);
+
+ tloc = lelb_to_cpu(cfi.icb.extLocation);
+ inode = udf_iget(child->d_inode->i_sb, &tloc);
+ if (!inode)
+ goto out_unlock;
+
+ return d_obtain_alias(inode);
+out_unlock:
+ return ERR_PTR(-EACCES);
+}
+
+
+static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block,
+ u16 partref, __u32 generation)
+{
+ struct inode *inode;
+ struct kernel_lb_addr loc;
+
+ if (block == 0)
+ return ERR_PTR(-ESTALE);
+
+ loc.logicalBlockNum = block;
+ loc.partitionReferenceNum = partref;
+ inode = udf_iget(sb, &loc);
+
+ if (inode == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ if (generation && inode->i_generation != generation) {
+ iput(inode);
+ return ERR_PTR(-ESTALE);
+ }
+ return d_obtain_alias(inode);
+}
+
+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) ||
+ (fh_type != FILEID_UDF_WITH_PARENT &&
+ fh_type != FILEID_UDF_WITHOUT_PARENT))
+ return NULL;
+
+ return udf_nfs_get_inode(sb, fid->udf.block, fid->udf.partref,
+ fid->udf.generation);
+}
+
+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)
+ return NULL;
+
+ return udf_nfs_get_inode(sb, fid->udf.parent_block,
+ fid->udf.parent_partref,
+ fid->udf.parent_generation);
+}
+static int udf_encode_fh(struct inode *inode, __u32 *fh, int *lenp,
+ struct inode *parent)
+{
+ int len = *lenp;
+ struct kernel_lb_addr location = UDF_I(inode)->i_location;
+ struct fid *fid = (struct fid *)fh;
+ int type = FILEID_UDF_WITHOUT_PARENT;
+
+ if (parent && (len < 5)) {
+ *lenp = 5;
+ return FILEID_INVALID;
+ } else if (len < 3) {
+ *lenp = 3;
+ return FILEID_INVALID;
+ }
+
+ *lenp = 3;
+ fid->udf.block = location.logicalBlockNum;
+ fid->udf.partref = location.partitionReferenceNum;
+ fid->udf.parent_partref = 0;
+ fid->udf.generation = inode->i_generation;
+
+ if (parent) {
+ location = UDF_I(parent)->i_location;
+ fid->udf.parent_block = location.logicalBlockNum;
+ fid->udf.parent_partref = location.partitionReferenceNum;
+ fid->udf.parent_generation = inode->i_generation;
+ *lenp = 5;
+ type = FILEID_UDF_WITH_PARENT;
+ }
+
+ return type;
+}
+
+const struct export_operations udf_export_ops = {
+ .encode_fh = udf_encode_fh,
+ .fh_to_dentry = udf_fh_to_dentry,
+ .fh_to_parent = udf_fh_to_parent,
+ .get_parent = udf_get_parent,
+};
+
const struct inode_operations udf_dir_inode_operations = {
.lookup = udf_lookup,
.create = udf_create,
@@ -1308,4 +1334,10 @@ const struct inode_operations udf_dir_inode_operations = {
.rmdir = udf_rmdir,
.mknod = udf_mknod,
.rename = udf_rename,
+ .tmpfile = udf_tmpfile,
+};
+const struct inode_operations udf_symlink_inode_operations = {
+ .readlink = generic_readlink,
+ .follow_link = page_follow_link_light,
+ .put_link = page_put_link,
};
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 02:03:42 +0000