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[XFS] use filldir internally

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Currently xfs has a rather complicated internal scheme to allow for
different directory formats in IRIX. This patch rips all code related to
this out and pushes useage of the Linux filldir callback into the lowlevel
directory code. This does not make the code any less portable because
filldir can be used to create dirents of all possible variations
(including the IRIX ones as proved by the IRIX binary emulation code under
arch/mips/).

This patch get rid of an unessecary copy in the readdir path, about 400
lines of code and one of the last two users of the uio structure.

This version is updated to deal with dmapi aswell which greatly simplifies
the get_dirattrs code. The dmapi part has been tested using the
get_dirattrs tools from the xfstest dmapi suite1 with various small and
large directories.

SGI-PV: 968563
SGI-Modid: xfs-linux-melb:xfs-kern:29478a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
This commit is contained in:
Christoph Hellwig 2007-08-28 13:58:24 +10:00 committed by Tim Shimmin
parent 2bdf7cd0ba
commit 051e7cd44a
12 changed files with 154 additions and 409 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

88
fs/xfs/linux-2.6/xfs_file.c
View file

@ -233,74 +233,30 @@ xfs_file_readdir(
void *dirent,
filldir_t filldir)
{
int error = 0;
bhv_vnode_t *vp = vn_from_inode(filp->f_path.dentry->d_inode);
uio_t uio;
iovec_t iov;
int eof = 0;
caddr_t read_buf;
int namelen, size = 0;
size_t rlen = PAGE_CACHE_SIZE;
xfs_off_t start_offset, curr_offset;
xfs_dirent_t *dbp = NULL;
struct inode *inode = filp->f_path.dentry->d_inode;
bhv_vnode_t *vp = vn_from_inode(inode);
int error;
size_t bufsize;
/* Try fairly hard to get memory */
do {
if ((read_buf = kmalloc(rlen, GFP_KERNEL)))
break;
rlen >>= 1;
} while (rlen >= 1024);
/*
* The Linux API doesn't pass down the total size of the buffer
* we read into down to the filesystem. With the filldir concept
* it's not needed for correct information, but the XFS dir2 leaf
* code wants an estimate of the buffer size to calculate it's
* readahead window and size the buffers used for mapping to
* physical blocks.
*
* Try to give it an estimate that's good enough, maybe at some
* point we can change the ->readdir prototype to include the
* buffer size.
*/
bufsize = (size_t)min_t(loff_t, PAGE_SIZE, inode->i_size);
if (read_buf == NULL)
return -ENOMEM;
uio.uio_iov = &iov;
uio.uio_segflg = UIO_SYSSPACE;
curr_offset = filp->f_pos;
if (filp->f_pos != 0x7fffffff)
uio.uio_offset = filp->f_pos;
else
uio.uio_offset = 0xffffffff;
while (!eof) {
uio.uio_resid = iov.iov_len = rlen;
iov.iov_base = read_buf;
uio.uio_iovcnt = 1;
start_offset = uio.uio_offset;
error = bhv_vop_readdir(vp, &uio, NULL, &eof);
if ((uio.uio_offset == start_offset) || error) {
size = 0;
break;
}
size = rlen - uio.uio_resid;
dbp = (xfs_dirent_t *)read_buf;
while (size > 0) {
namelen = strlen(dbp->d_name);
if (filldir(dirent, dbp->d_name, namelen,
(loff_t) curr_offset & 0x7fffffff,
(ino_t) dbp->d_ino,
DT_UNKNOWN)) {
goto done;
}
size -= dbp->d_reclen;
curr_offset = (loff_t)dbp->d_off /* & 0x7fffffff */;
dbp = (xfs_dirent_t *)((char *)dbp + dbp->d_reclen);
}
}
done:
if (!error) {
if (size == 0)
filp->f_pos = uio.uio_offset & 0x7fffffff;
else if (dbp)
filp->f_pos = curr_offset;
}
kfree(read_buf);
return -error;
error = bhv_vop_readdir(vp, dirent, bufsize,
(xfs_off_t *)&filp->f_pos, filldir);
if (error)
return -error;
return 0;
}
STATIC int

8
fs/xfs/linux-2.6/xfs_vnode.h
View file

@ -161,8 +161,8 @@ typedef int (*vop_rename_t)(bhv_desc_t *, bhv_vname_t *, bhv_vnode_t *,
typedef int (*vop_mkdir_t)(bhv_desc_t *, bhv_vname_t *, struct bhv_vattr *,
bhv_vnode_t **, struct cred *);
typedef int (*vop_rmdir_t)(bhv_desc_t *, bhv_vname_t *, struct cred *);
typedef int (*vop_readdir_t)(bhv_desc_t *, struct uio *, struct cred *,
int *);
typedef int (*vop_readdir_t)(bhv_desc_t *, void *dirent, size_t bufsize,
xfs_off_t *offset, filldir_t filldir);
typedef int (*vop_symlink_t)(bhv_desc_t *, bhv_vname_t *, struct bhv_vattr*,
char *, bhv_vnode_t **, struct cred *);
typedef int (*vop_readlink_t)(bhv_desc_t *, struct uio *, int,
@ -267,8 +267,8 @@ typedef struct bhv_vnodeops {
#define bhv_vop_mkdir(dp,d,vap,vpp,cr) \
VOP(vop_mkdir, dp)(VNHEAD(dp),d,vap,vpp,cr)
#define bhv_vop_rmdir(dp,d,cr) VOP(vop_rmdir, dp)(VNHEAD(dp),d,cr)
#define bhv_vop_readdir(vp,uiop,cr,eofp) \
VOP(vop_readdir, vp)(VNHEAD(vp),uiop,cr,eofp)
#define bhv_vop_readdir(vp,dirent,bufsize,offset,filldir) \
VOP(vop_readdir, vp)(VNHEAD(vp),dirent,bufsize,offset,filldir)
#define bhv_vop_symlink(dvp,d,vap,tnm,vpp,cr) \
VOP(vop_symlink, dvp)(VNHEAD(dvp),d,vap,tnm,vpp,cr)
#define bhv_vop_readlink(vp,uiop,fl,cr) \

121
fs/xfs/xfs_dir2.c
View file

@ -43,8 +43,6 @@
#include "xfs_dir2_trace.h"
#include "xfs_error.h"
static int xfs_dir2_put_dirent64_direct(xfs_dir2_put_args_t *pa);
static int xfs_dir2_put_dirent64_uio(xfs_dir2_put_args_t *pa);
void
xfs_dir_mount(
@ -293,47 +291,35 @@ xfs_dir_removename(
* Read a directory.
*/
int
xfs_dir_getdents(
xfs_trans_t *tp,
xfs_inode_t *dp,
uio_t *uio, /* caller's buffer control */
int *eofp) /* out: eof reached */
xfs_readdir(
bhv_desc_t *dir_bdp,
void *dirent,
size_t bufsize,
xfs_off_t *offset,
filldir_t filldir)
{
int alignment; /* alignment required for ABI */
xfs_dirent_t *dbp; /* malloc'ed buffer */
xfs_dir2_put_t put; /* entry formatting routine */
xfs_inode_t *dp = XFS_BHVTOI(dir_bdp);
int rval; /* return value */
int v; /* type-checking value */
vn_trace_entry(BHV_TO_VNODE(dir_bdp), __FUNCTION__,
(inst_t *)__return_address);
if (XFS_FORCED_SHUTDOWN(dp->i_mount))
return XFS_ERROR(EIO);
ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR);
XFS_STATS_INC(xs_dir_getdents);
/*
* If our caller has given us a single contiguous aligned memory buffer,
* just work directly within that buffer. If it's in user memory,
* lock it down first.
*/
alignment = sizeof(xfs_off_t) - 1;
if ((uio->uio_iovcnt == 1) &&
(((__psint_t)uio->uio_iov[0].iov_base & alignment) == 0) &&
((uio->uio_iov[0].iov_len & alignment) == 0)) {
dbp = NULL;
put = xfs_dir2_put_dirent64_direct;
} else {
dbp = kmem_alloc(sizeof(*dbp) + MAXNAMELEN, KM_SLEEP);
put = xfs_dir2_put_dirent64_uio;
}
*eofp = 0;
if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
rval = xfs_dir2_sf_getdents(dp, uio, eofp, dbp, put);
else if ((rval = xfs_dir2_isblock(tp, dp, &v)))
rval = xfs_dir2_sf_getdents(dp, dirent, offset, filldir);
else if ((rval = xfs_dir2_isblock(NULL, dp, &v)))
;
else if (v)
rval = xfs_dir2_block_getdents(tp, dp, uio, eofp, dbp, put);
rval = xfs_dir2_block_getdents(dp, dirent, offset, filldir);
else
rval = xfs_dir2_leaf_getdents(tp, dp, uio, eofp, dbp, put);
if (dbp != NULL)
kmem_free(dbp, sizeof(*dbp) + MAXNAMELEN);
rval = xfs_dir2_leaf_getdents(dp, dirent, bufsize, offset,
filldir);
return rval;
}
@ -612,77 +598,6 @@ xfs_dir2_isleaf(
return 0;
}
/*
* Getdents put routine for 64-bit ABI, direct form.
*/
static int
xfs_dir2_put_dirent64_direct(
xfs_dir2_put_args_t *pa)
{
xfs_dirent_t *idbp; /* dirent pointer */
iovec_t *iovp; /* io vector */
int namelen; /* entry name length */
int reclen; /* entry total length */
uio_t *uio; /* I/O control */
namelen = pa->namelen;
reclen = DIRENTSIZE(namelen);
uio = pa->uio;
/*
* Won't fit in the remaining space.
*/
if (reclen > uio->uio_resid) {
pa->done = 0;
return 0;
}
iovp = uio->uio_iov;
idbp = (xfs_dirent_t *)iovp->iov_base;
iovp->iov_base = (char *)idbp + reclen;
iovp->iov_len -= reclen;
uio->uio_resid -= reclen;
idbp->d_reclen = reclen;
idbp->d_ino = pa->ino;
idbp->d_off = pa->cook;
idbp->d_name[namelen] = '\0';
pa->done = 1;
memcpy(idbp->d_name, pa->name, namelen);
return 0;
}
/*
* Getdents put routine for 64-bit ABI, uio form.
*/
static int
xfs_dir2_put_dirent64_uio(
xfs_dir2_put_args_t *pa)
{
xfs_dirent_t *idbp; /* dirent pointer */
int namelen; /* entry name length */
int reclen; /* entry total length */
int rval; /* return value */
uio_t *uio; /* I/O control */
namelen = pa->namelen;
reclen = DIRENTSIZE(namelen);
uio = pa->uio;
/*
* Won't fit in the remaining space.
*/
if (reclen > uio->uio_resid) {
pa->done = 0;
return 0;
}
idbp = pa->dbp;
idbp->d_reclen = reclen;
idbp->d_ino = pa->ino;
idbp->d_off = pa->cook;
idbp->d_name[namelen] = '\0';
memcpy(idbp->d_name, pa->name, namelen);
rval = xfs_uio_read((caddr_t)idbp, reclen, uio);
pa->done = (rval == 0);
return rval;
}
/*
* Remove the given block from the directory.
* This routine is used for data and free blocks, leaf/node are done

19
fs/xfs/xfs_dir2.h
View file

@ -59,21 +59,6 @@ typedef __uint32_t xfs_dir2_db_t;
*/
typedef xfs_off_t xfs_dir2_off_t;
/*
* For getdents, argument struct for put routines.
*/
typedef int (*xfs_dir2_put_t)(struct xfs_dir2_put_args *pa);
typedef struct xfs_dir2_put_args {
xfs_off_t cook; /* cookie of (next) entry */
xfs_intino_t ino; /* inode number */
xfs_dirent_t *dbp; /* buffer pointer */
char *name; /* directory entry name */
int namelen; /* length of name */
int done; /* output: set if value was stored */
xfs_dir2_put_t put; /* put function ptr (i/o) */
struct uio *uio; /* uio control structure */
} xfs_dir2_put_args_t;
/*
* Generic directory interface routines
*/
@ -92,8 +77,6 @@ extern int xfs_dir_removename(struct xfs_trans *tp, struct xfs_inode *dp,
char *name, int namelen, xfs_ino_t ino,
xfs_fsblock_t *first,
struct xfs_bmap_free *flist, xfs_extlen_t tot);
extern int xfs_dir_getdents(struct xfs_trans *tp, struct xfs_inode *dp,
uio_t *uio, int *eofp);
extern int xfs_dir_replace(struct xfs_trans *tp, struct xfs_inode *dp,
char *name, int namelen, xfs_ino_t inum,
xfs_fsblock_t *first,
@ -101,6 +84,8 @@ extern int xfs_dir_replace(struct xfs_trans *tp, struct xfs_inode *dp,
extern int xfs_dir_canenter(struct xfs_trans *tp, struct xfs_inode *dp,
char *name, int namelen);
extern int xfs_dir_ino_validate(struct xfs_mount *mp, xfs_ino_t ino);
extern int xfs_readdir(bhv_desc_t *dir_bdp, void *dirent, size_t bufsize,
xfs_off_t *offset, filldir_t filldir);
/*
* Utility routines for v2 directories.

63
fs/xfs/xfs_dir2_block.c
View file

@ -432,12 +432,10 @@ xfs_dir2_block_addname(
*/
int /* error */
xfs_dir2_block_getdents(
xfs_trans_t *tp, /* transaction (NULL) */
xfs_inode_t *dp, /* incore inode */
uio_t *uio, /* caller's buffer control */
int *eofp, /* eof reached? (out) */
xfs_dirent_t *dbp, /* caller's buffer */
xfs_dir2_put_t put) /* abi's formatting function */
void *dirent,
xfs_off_t *offset,
filldir_t filldir)
{
xfs_dir2_block_t *block; /* directory block structure */
xfs_dabuf_t *bp; /* buffer for block */
@ -447,31 +445,32 @@ xfs_dir2_block_getdents(
char *endptr; /* end of the data entries */
int error; /* error return value */
xfs_mount_t *mp; /* filesystem mount point */
xfs_dir2_put_args_t p; /* arg package for put rtn */
char *ptr; /* current data entry */
int wantoff; /* starting block offset */
xfs_ino_t ino;
xfs_off_t cook;
mp = dp->i_mount;
/*
* If the block number in the offset is out of range, we're done.
*/
if (xfs_dir2_dataptr_to_db(mp, uio->uio_offset) > mp->m_dirdatablk) {
*eofp = 1;
if (xfs_dir2_dataptr_to_db(mp, *offset) > mp->m_dirdatablk) {
return 0;
}
/*
* Can't read the block, give up, else get dabuf in bp.
*/
if ((error =
xfs_da_read_buf(tp, dp, mp->m_dirdatablk, -1, &bp, XFS_DATA_FORK))) {
error = xfs_da_read_buf(NULL, dp, mp->m_dirdatablk, -1,
&bp, XFS_DATA_FORK);
if (error)
return error;
}
ASSERT(bp != NULL);
/*
* Extract the byte offset we start at from the seek pointer.
* We'll skip entries before this.
*/
wantoff = xfs_dir2_dataptr_to_off(mp, uio->uio_offset);
wantoff = xfs_dir2_dataptr_to_off(mp, *offset);
block = bp->data;
xfs_dir2_data_check(dp, bp);
/*
@ -480,9 +479,7 @@ xfs_dir2_block_getdents(
btp = xfs_dir2_block_tail_p(mp, block);
ptr = (char *)block->u;
endptr = (char *)xfs_dir2_block_leaf_p(btp);
p.dbp = dbp;
p.put = put;
p.uio = uio;
/*
* Loop over the data portion of the block.
* Each object is a real entry (dep) or an unused one (dup).
@ -508,33 +505,24 @@ xfs_dir2_block_getdents(
*/
if ((char *)dep - (char *)block < wantoff)
continue;
/*
* Set up argument structure for put routine.
*/
p.namelen = dep->namelen;
p.cook = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
cook = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
ptr - (char *)block);
p.ino = be64_to_cpu(dep->inumber);
ino = be64_to_cpu(dep->inumber);
#if XFS_BIG_INUMS
p.ino += mp->m_inoadd;
ino += mp->m_inoadd;
#endif
p.name = (char *)dep->name;
/*
* Put the entry in the caller's buffer.
*/
error = p.put(&p);
/*
* If it didn't fit, set the final offset to here & return.
*/
if (!p.done) {
uio->uio_offset =
xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
if (filldir(dirent, dep->name, dep->namelen, cook,
ino, DT_UNKNOWN)) {
*offset = xfs_dir2_db_off_to_dataptr(mp,
mp->m_dirdatablk,
(char *)dep - (char *)block);
xfs_da_brelse(tp, bp);
return error;
xfs_da_brelse(NULL, bp);
return 0;
}
}
@ -542,13 +530,8 @@ xfs_dir2_block_getdents(
* Reached the end of the block.
* Set the offset to a non-existent block 1 and return.
*/
*eofp = 1;
uio->uio_offset =
xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk + 1, 0);
xfs_da_brelse(tp, bp);
*offset = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk + 1, 0);
xfs_da_brelse(NULL, bp);
return 0;
}

5
fs/xfs/xfs_dir2_block.h
View file

@ -80,9 +80,8 @@ xfs_dir2_block_leaf_p(xfs_dir2_block_tail_t *btp)
* Function declarations.
*/
extern int xfs_dir2_block_addname(struct xfs_da_args *args);
extern int xfs_dir2_block_getdents(struct xfs_trans *tp, struct xfs_inode *dp,
struct uio *uio, int *eofp,
struct xfs_dirent *dbp, xfs_dir2_put_t put);
extern int xfs_dir2_block_getdents(struct xfs_inode *dp, void *dirent,
xfs_off_t *offset, filldir_t filldir);
extern int xfs_dir2_block_lookup(struct xfs_da_args *args);
extern int xfs_dir2_block_removename(struct xfs_da_args *args);
extern int xfs_dir2_block_replace(struct xfs_da_args *args);

76
fs/xfs/xfs_dir2_leaf.c
View file

@ -749,12 +749,11 @@ xfs_dir2_leaf_compact_x1(
*/
int /* error */
xfs_dir2_leaf_getdents(
xfs_trans_t *tp, /* transaction pointer */
xfs_inode_t *dp, /* incore directory inode */
uio_t *uio, /* I/O control & vectors */
int *eofp, /* out: reached end of dir */
xfs_dirent_t *dbp, /* caller's buffer */
xfs_dir2_put_t put) /* ABI formatting routine */
void *dirent,
size_t bufsize,
xfs_off_t *offset,
filldir_t filldir)
{
xfs_dabuf_t *bp; /* data block buffer */
int byteoff; /* offset in current block */
@ -763,7 +762,6 @@ xfs_dir2_leaf_getdents(
xfs_dir2_data_t *data; /* data block structure */
xfs_dir2_data_entry_t *dep; /* data entry */
xfs_dir2_data_unused_t *dup; /* unused entry */
int eof; /* reached end of directory */
int error = 0; /* error return value */
int i; /* temporary loop index */
int j; /* temporary loop index */
@ -776,46 +774,38 @@ xfs_dir2_leaf_getdents(
xfs_mount_t *mp; /* filesystem mount point */
xfs_dir2_off_t newoff; /* new curoff after new blk */
int nmap; /* mappings to ask xfs_bmapi */
xfs_dir2_put_args_t *p; /* formatting arg bundle */
char *ptr = NULL; /* pointer to current data */
int ra_current; /* number of read-ahead blks */
int ra_index; /* *map index for read-ahead */
int ra_offset; /* map entry offset for ra */
int ra_want; /* readahead count wanted */
xfs_ino_t ino;
/*
* If the offset is at or past the largest allowed value,
* give up right away, return eof.
* give up right away.
*/
if (uio->uio_offset >= XFS_DIR2_MAX_DATAPTR) {
*eofp = 1;
if (*offset >= XFS_DIR2_MAX_DATAPTR)
return 0;
}
mp = dp->i_mount;
/*
* Setup formatting arguments.
*/
p = kmem_alloc(sizeof(*p), KM_SLEEP);
p->dbp = dbp;
p->put = put;
p->uio = uio;
/*
* Set up to bmap a number of blocks based on the caller's
* buffer size, the directory block size, and the filesystem
* block size.
*/
map_size =
howmany(uio->uio_resid + mp->m_dirblksize,
mp->m_sb.sb_blocksize);
map_size = howmany(bufsize + mp->m_dirblksize, mp->m_sb.sb_blocksize);
map = kmem_alloc(map_size * sizeof(*map), KM_SLEEP);
map_valid = ra_index = ra_offset = ra_current = map_blocks = 0;
bp = NULL;
eof = 1;
/*
* Inside the loop we keep the main offset value as a byte offset
* in the directory file.
*/
curoff = xfs_dir2_dataptr_to_byte(mp, uio->uio_offset);
curoff = xfs_dir2_dataptr_to_byte(mp, *offset);
/*
* Force this conversion through db so we truncate the offset
* down to get the start of the data block.
@ -836,7 +826,7 @@ xfs_dir2_leaf_getdents(
* take it out of the mapping.
*/
if (bp) {
xfs_da_brelse(tp, bp);
xfs_da_brelse(NULL, bp);
bp = NULL;
map_blocks -= mp->m_dirblkfsbs;
/*
@ -862,8 +852,9 @@ xfs_dir2_leaf_getdents(
/*
* Recalculate the readahead blocks wanted.
*/
ra_want = howmany(uio->uio_resid + mp->m_dirblksize,
ra_want = howmany(bufsize + mp->m_dirblksize,
mp->m_sb.sb_blocksize) - 1;
/*
* If we don't have as many as we want, and we haven't
* run out of data blocks, get some more mappings.
@ -876,7 +867,7 @@ xfs_dir2_leaf_getdents(
* we already have in the table.
*/
nmap = map_size - map_valid;
error = xfs_bmapi(tp, dp,
error = xfs_bmapi(NULL, dp,
map_off,
xfs_dir2_byte_to_da(mp,
XFS_DIR2_LEAF_OFFSET) - map_off,
@ -939,7 +930,7 @@ xfs_dir2_leaf_getdents(
* mapping.
*/
curdb = xfs_dir2_da_to_db(mp, map->br_startoff);
error = xfs_da_read_buf(tp, dp, map->br_startoff,
error = xfs_da_read_buf(NULL, dp, map->br_startoff,
map->br_blockcount >= mp->m_dirblkfsbs ?
XFS_FSB_TO_DADDR(mp, map->br_startblock) :
-1,
@ -982,7 +973,7 @@ xfs_dir2_leaf_getdents(
* is a very rare case.
*/
else if (i > ra_current) {
(void)xfs_da_reada_buf(tp, dp,
(void)xfs_da_reada_buf(NULL, dp,
map[ra_index].br_startoff +
ra_offset, XFS_DATA_FORK);
ra_current = i;
@ -1089,46 +1080,39 @@ xfs_dir2_leaf_getdents(
*/
dep = (xfs_dir2_data_entry_t *)ptr;
p->namelen = dep->namelen;
length = xfs_dir2_data_entsize(dep->namelen);
length = xfs_dir2_data_entsize(p->namelen);
p->cook = xfs_dir2_byte_to_dataptr(mp, curoff + length);
p->ino = be64_to_cpu(dep->inumber);
ino = be64_to_cpu(dep->inumber);
#if XFS_BIG_INUMS
p->ino += mp->m_inoadd;
ino += mp->m_inoadd;
#endif
p->name = (char *)dep->name;
error = p->put(p);
/*
* Won't fit. Return to caller.
*/
if (!p->done) {
eof = 0;
if (filldir(dirent, dep->name, dep->namelen,
xfs_dir2_byte_to_dataptr(mp, curoff + length),
ino, DT_UNKNOWN))
break;
}
/*
* Advance to next entry in the block.
*/
ptr += length;
curoff += length;
bufsize -= length;
}
/*
* All done. Set output offset value to current offset.
*/
*eofp = eof;
if (curoff > xfs_dir2_dataptr_to_byte(mp, XFS_DIR2_MAX_DATAPTR))
uio->uio_offset = XFS_DIR2_MAX_DATAPTR;
*offset = XFS_DIR2_MAX_DATAPTR;
else
uio->uio_offset = xfs_dir2_byte_to_dataptr(mp, curoff);
*offset = xfs_dir2_byte_to_dataptr(mp, curoff);
kmem_free(map, map_size * sizeof(*map));
kmem_free(p, sizeof(*p));
if (bp)
xfs_da_brelse(tp, bp);
xfs_da_brelse(NULL, bp);
return error;
}

6
fs/xfs/xfs_dir2_leaf.h
View file

@ -232,9 +232,9 @@ extern void xfs_dir2_leaf_compact(struct xfs_da_args *args,
extern void xfs_dir2_leaf_compact_x1(struct xfs_dabuf *bp, int *indexp,
int *lowstalep, int *highstalep,
int *lowlogp, int *highlogp);
extern int xfs_dir2_leaf_getdents(struct xfs_trans *tp, struct xfs_inode *dp,
struct uio *uio, int *eofp,
struct xfs_dirent *dbp, xfs_dir2_put_t put);
extern int xfs_dir2_leaf_getdents(struct xfs_inode *dp, void *dirent,
size_t bufsize, xfs_off_t *offset,
filldir_t filldir);
extern int xfs_dir2_leaf_init(struct xfs_da_args *args, xfs_dir2_db_t bno,
struct xfs_dabuf **bpp, int magic);
extern void xfs_dir2_leaf_log_ents(struct xfs_trans *tp, struct xfs_dabuf *bp,

129
fs/xfs/xfs_dir2_sf.c
View file

@ -695,19 +695,18 @@ xfs_dir2_sf_create(
int /* error */
xfs_dir2_sf_getdents(
xfs_inode_t *dp, /* incore directory inode */
uio_t *uio, /* caller's buffer control */
int *eofp, /* eof reached? (out) */
xfs_dirent_t *dbp, /* caller's buffer */
xfs_dir2_put_t put) /* abi's formatting function */
void *dirent,
xfs_off_t *offset,
filldir_t filldir)
{
int error; /* error return value */
int i; /* shortform entry number */
xfs_mount_t *mp; /* filesystem mount point */
xfs_dir2_dataptr_t off; /* current entry's offset */
xfs_dir2_put_args_t p; /* arg package for put rtn */
xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */
xfs_dir2_sf_t *sfp; /* shortform structure */
xfs_off_t dir_offset;
xfs_dir2_dataptr_t dot_offset;
xfs_dir2_dataptr_t dotdot_offset;
xfs_ino_t ino;
mp = dp->i_mount;
@ -720,8 +719,6 @@ xfs_dir2_sf_getdents(
return XFS_ERROR(EIO);
}
dir_offset = uio->uio_offset;
ASSERT(dp->i_df.if_bytes == dp->i_d.di_size);
ASSERT(dp->i_df.if_u1.if_data != NULL);
@ -732,108 +729,78 @@ xfs_dir2_sf_getdents(
/*
* If the block number in the offset is out of range, we're done.
*/
if (xfs_dir2_dataptr_to_db(mp, dir_offset) > mp->m_dirdatablk) {
*eofp = 1;
if (xfs_dir2_dataptr_to_db(mp, *offset) > mp->m_dirdatablk)
return 0;
}
/*
* Set up putargs structure.
* Precalculate offsets for . and .. as we will always need them.
*
* XXX(hch): the second argument is sometimes 0 and sometimes
* mp->m_dirdatablk.
*/
p.dbp = dbp;
p.put = put;
p.uio = uio;
dot_offset = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
XFS_DIR2_DATA_DOT_OFFSET);
dotdot_offset = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
XFS_DIR2_DATA_DOTDOT_OFFSET);
/*
* Put . entry unless we're starting past it.
*/
if (dir_offset <=
xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
XFS_DIR2_DATA_DOT_OFFSET)) {
p.cook = xfs_dir2_db_off_to_dataptr(mp, 0,
XFS_DIR2_DATA_DOTDOT_OFFSET);
p.ino = dp->i_ino;
if (*offset <= dot_offset) {
ino = dp->i_ino;
#if XFS_BIG_INUMS
p.ino += mp->m_inoadd;
ino += mp->m_inoadd;
#endif
p.name = ".";
p.namelen = 1;
error = p.put(&p);
if (!p.done) {
uio->uio_offset =
xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
XFS_DIR2_DATA_DOT_OFFSET);
return error;
if (filldir(dirent, ".", 1, dotdot_offset, ino, DT_DIR)) {
*offset = dot_offset;
return 0;
}
}
/*
* Put .. entry unless we're starting past it.
*/
if (dir_offset <=
xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
XFS_DIR2_DATA_DOTDOT_OFFSET)) {
p.cook = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
XFS_DIR2_DATA_FIRST_OFFSET);
p.ino = xfs_dir2_sf_get_inumber(sfp, &sfp->hdr.parent);
if (*offset <= dotdot_offset) {
off = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
XFS_DIR2_DATA_FIRST_OFFSET);
ino = xfs_dir2_sf_get_inumber(sfp, &sfp->hdr.parent);
#if XFS_BIG_INUMS
p.ino += mp->m_inoadd;
ino += mp->m_inoadd;
#endif
p.name = "..";
p.namelen = 2;
error = p.put(&p);
if (!p.done) {
uio->uio_offset =
xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
XFS_DIR2_DATA_DOTDOT_OFFSET);
return error;
if (filldir(dirent, "..", 2, off, ino, DT_DIR)) {
*offset = dotdot_offset;
return 0;
}
}
/*
* Loop while there are more entries and put'ing works.
*/
for (i = 0, sfep = xfs_dir2_sf_firstentry(sfp);
i < sfp->hdr.count;
i++, sfep = xfs_dir2_sf_nextentry(sfp, sfep)) {
sfep = xfs_dir2_sf_firstentry(sfp);
for (i = 0; i < sfp->hdr.count; i++) {
off = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
xfs_dir2_sf_get_offset(sfep));
if (dir_offset > off)
if (*offset > off) {
sfep = xfs_dir2_sf_nextentry(sfp, sfep);
continue;
p.namelen = sfep->namelen;
p.cook = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk,
xfs_dir2_sf_get_offset(sfep) +
xfs_dir2_data_entsize(p.namelen));
p.ino = xfs_dir2_sf_get_inumber(sfp, xfs_dir2_sf_inumberp(sfep));
#if XFS_BIG_INUMS
p.ino += mp->m_inoadd;
#endif
p.name = (char *)sfep->name;
error = p.put(&p);
if (!p.done) {
uio->uio_offset = off;
return error;
}
ino = xfs_dir2_sf_get_inumber(sfp, xfs_dir2_sf_inumberp(sfep));
#if XFS_BIG_INUMS
ino += mp->m_inoadd;
#endif
if (filldir(dirent, sfep->name, sfep->namelen,
off + xfs_dir2_data_entsize(sfep->namelen),
ino, DT_UNKNOWN)) {
*offset = off;
return 0;
}
sfep = xfs_dir2_sf_nextentry(sfp, sfep);
}
/*
* They all fit.
*/
*eofp = 1;
uio->uio_offset =
xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk + 1, 0);
*offset = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk + 1, 0);
return 0;
}

5
fs/xfs/xfs_dir2_sf.h
View file

@ -169,9 +169,8 @@ extern int xfs_dir2_block_to_sf(struct xfs_da_args *args, struct xfs_dabuf *bp,
int size, xfs_dir2_sf_hdr_t *sfhp);
extern int xfs_dir2_sf_addname(struct xfs_da_args *args);
extern int xfs_dir2_sf_create(struct xfs_da_args *args, xfs_ino_t pino);
extern int xfs_dir2_sf_getdents(struct xfs_inode *dp, struct uio *uio,
int *eofp, struct xfs_dirent *dbp,
xfs_dir2_put_t put);
extern int xfs_dir2_sf_getdents(struct xfs_inode *dp, void *dirent,
xfs_off_t *offset, filldir_t filldir);
extern int xfs_dir2_sf_lookup(struct xfs_da_args *args);
extern int xfs_dir2_sf_removename(struct xfs_da_args *args);
extern int xfs_dir2_sf_replace(struct xfs_da_args *args);

12
fs/xfs/xfs_types.h
View file

@ -151,18 +151,6 @@ typedef __uint8_t xfs_arch_t; /* architecture of an xfs fs */
*/
#define MAXNAMELEN 256
typedef struct xfs_dirent { /* data from readdir() */
xfs_ino_t d_ino; /* inode number of entry */
xfs_off_t d_off; /* offset of disk directory entry */
unsigned short d_reclen; /* length of this record */
char d_name[1]; /* name of file */
} xfs_dirent_t;
#define DIRENTBASESIZE (((xfs_dirent_t *)0)->d_name - (char *)0)
#define DIRENTSIZE(namelen) \
((DIRENTBASESIZE + (namelen) + \
sizeof(xfs_off_t)) & ~(sizeof(xfs_off_t) - 1))
typedef enum {
XFS_LOOKUP_EQi, XFS_LOOKUP_LEi, XFS_LOOKUP_GEi
} xfs_lookup_t;

31
fs/xfs/xfs_vnodeops.c
View file

@ -3284,37 +3284,6 @@ xfs_rmdir(
goto std_return;
}
/*
* Read dp's entries starting at uiop->uio_offset and translate them into
* bufsize bytes worth of struct dirents starting at bufbase.
*/
STATIC int
xfs_readdir(
bhv_desc_t *dir_bdp,
uio_t *uiop,
cred_t *credp,
int *eofp)
{
xfs_inode_t *dp;
xfs_trans_t *tp = NULL;
int error = 0;
uint lock_mode;
vn_trace_entry(BHV_TO_VNODE(dir_bdp), __FUNCTION__,
(inst_t *)__return_address);
dp = XFS_BHVTOI(dir_bdp);
if (XFS_FORCED_SHUTDOWN(dp->i_mount))
return XFS_ERROR(EIO);
lock_mode = xfs_ilock_map_shared(dp);
error = xfs_dir_getdents(tp, dp, uiop, eofp);
xfs_iunlock_map_shared(dp, lock_mode);
return error;
}
STATIC int
xfs_symlink(
bhv_desc_t *dir_bdp,