diff options
Diffstat (limited to 'fs/xfs/xfs_dir2_readdir.c')
| -rw-r--r-- | fs/xfs/xfs_dir2_readdir.c | 199 |
1 files changed, 102 insertions, 97 deletions
diff --git a/fs/xfs/xfs_dir2_readdir.c b/fs/xfs/xfs_dir2_readdir.c index 8993ec17452..48e99afb9cb 100644 --- a/fs/xfs/xfs_dir2_readdir.c +++ b/fs/xfs/xfs_dir2_readdir.c @@ -18,23 +18,23 @@ */ #include "xfs.h" #include "xfs_fs.h" -#include "xfs_types.h" +#include "xfs_format.h" +#include "xfs_log_format.h" +#include "xfs_trans_resv.h" #include "xfs_bit.h" -#include "xfs_log.h" -#include "xfs_trans.h" #include "xfs_sb.h" #include "xfs_ag.h" #include "xfs_mount.h" +#include "xfs_da_format.h" #include "xfs_da_btree.h" -#include "xfs_bmap_btree.h" -#include "xfs_dinode.h" #include "xfs_inode.h" -#include "xfs_dir2_format.h" #include "xfs_dir2.h" #include "xfs_dir2_priv.h" #include "xfs_error.h" #include "xfs_trace.h" #include "xfs_bmap.h" +#include "xfs_trans.h" +#include "xfs_dinode.h" /* * Directory file type support functions @@ -76,26 +76,25 @@ const unsigned char xfs_mode_to_ftype[S_IFMT >> S_SHIFT] = { STATIC int xfs_dir2_sf_getdents( - xfs_inode_t *dp, /* incore directory inode */ + struct xfs_da_args *args, struct dir_context *ctx) { int i; /* shortform entry number */ - xfs_mount_t *mp; /* filesystem mount point */ + struct xfs_inode *dp = args->dp; /* incore directory inode */ xfs_dir2_dataptr_t off; /* current entry's offset */ xfs_dir2_sf_entry_t *sfep; /* shortform directory entry */ xfs_dir2_sf_hdr_t *sfp; /* shortform structure */ xfs_dir2_dataptr_t dot_offset; xfs_dir2_dataptr_t dotdot_offset; xfs_ino_t ino; - - mp = dp->i_mount; + struct xfs_da_geometry *geo = args->geo; ASSERT(dp->i_df.if_flags & XFS_IFINLINE); /* * Give up if the directory is way too short. */ if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) { - ASSERT(XFS_FORCED_SHUTDOWN(mp)); + ASSERT(XFS_FORCED_SHUTDOWN(dp->i_mount)); return XFS_ERROR(EIO); } @@ -109,19 +108,19 @@ 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, ctx->pos) > mp->m_dirdatablk) + if (xfs_dir2_dataptr_to_db(geo, ctx->pos) > geo->datablk) return 0; /* * Precalculate offsets for . and .. as we will always need them. * * XXX(hch): the second argument is sometimes 0 and sometimes - * mp->m_dirdatablk. + * geo->datablk */ - dot_offset = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk, - XFS_DIR3_DATA_DOT_OFFSET(mp)); - dotdot_offset = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk, - XFS_DIR3_DATA_DOTDOT_OFFSET(mp)); + dot_offset = xfs_dir2_db_off_to_dataptr(geo, geo->datablk, + dp->d_ops->data_dot_offset); + dotdot_offset = xfs_dir2_db_off_to_dataptr(geo, geo->datablk, + dp->d_ops->data_dotdot_offset); /* * Put . entry unless we're starting past it. @@ -136,7 +135,7 @@ xfs_dir2_sf_getdents( * Put .. entry unless we're starting past it. */ if (ctx->pos <= dotdot_offset) { - ino = xfs_dir2_sf_get_parent_ino(sfp); + ino = dp->d_ops->sf_get_parent_ino(sfp); ctx->pos = dotdot_offset & 0x7fffffff; if (!dir_emit(ctx, "..", 2, ino, DT_DIR)) return 0; @@ -149,25 +148,25 @@ xfs_dir2_sf_getdents( for (i = 0; i < sfp->count; i++) { __uint8_t filetype; - off = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk, + off = xfs_dir2_db_off_to_dataptr(geo, geo->datablk, xfs_dir2_sf_get_offset(sfep)); if (ctx->pos > off) { - sfep = xfs_dir3_sf_nextentry(mp, sfp, sfep); + sfep = dp->d_ops->sf_nextentry(sfp, sfep); continue; } - ino = xfs_dir3_sfe_get_ino(mp, sfp, sfep); - filetype = xfs_dir3_sfe_get_ftype(mp, sfp, sfep); + ino = dp->d_ops->sf_get_ino(sfp, sfep); + filetype = dp->d_ops->sf_get_ftype(sfep); ctx->pos = off & 0x7fffffff; if (!dir_emit(ctx, (char *)sfep->name, sfep->namelen, ino, - xfs_dir3_get_dtype(mp, filetype))) + xfs_dir3_get_dtype(dp->i_mount, filetype))) return 0; - sfep = xfs_dir3_sf_nextentry(mp, sfp, sfep); + sfep = dp->d_ops->sf_nextentry(sfp, sfep); } - ctx->pos = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk + 1, 0) & - 0x7fffffff; + ctx->pos = xfs_dir2_db_off_to_dataptr(geo, geo->datablk + 1, 0) & + 0x7fffffff; return 0; } @@ -176,9 +175,10 @@ xfs_dir2_sf_getdents( */ STATIC int xfs_dir2_block_getdents( - xfs_inode_t *dp, /* incore inode */ + struct xfs_da_args *args, struct dir_context *ctx) { + struct xfs_inode *dp = args->dp; /* incore directory inode */ xfs_dir2_data_hdr_t *hdr; /* block header */ struct xfs_buf *bp; /* buffer for block */ xfs_dir2_block_tail_t *btp; /* block tail */ @@ -186,16 +186,15 @@ xfs_dir2_block_getdents( xfs_dir2_data_unused_t *dup; /* block unused entry */ char *endptr; /* end of the data entries */ int error; /* error return value */ - xfs_mount_t *mp; /* filesystem mount point */ char *ptr; /* current data entry */ int wantoff; /* starting block offset */ xfs_off_t cook; + struct xfs_da_geometry *geo = args->geo; - 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, ctx->pos) > mp->m_dirdatablk) + if (xfs_dir2_dataptr_to_db(geo, ctx->pos) > geo->datablk) return 0; error = xfs_dir3_block_read(NULL, dp, &bp); @@ -206,14 +205,14 @@ xfs_dir2_block_getdents( * Extract the byte offset we start at from the seek pointer. * We'll skip entries before this. */ - wantoff = xfs_dir2_dataptr_to_off(mp, ctx->pos); + wantoff = xfs_dir2_dataptr_to_off(geo, ctx->pos); hdr = bp->b_addr; xfs_dir3_data_check(dp, bp); /* * Set up values for the loop. */ - btp = xfs_dir2_block_tail_p(mp, hdr); - ptr = (char *)xfs_dir3_data_entry_p(hdr); + btp = xfs_dir2_block_tail_p(geo, hdr); + ptr = (char *)dp->d_ops->data_entry_p(hdr); endptr = (char *)xfs_dir2_block_leaf_p(btp); /* @@ -237,24 +236,24 @@ xfs_dir2_block_getdents( /* * Bump pointer for the next iteration. */ - ptr += xfs_dir3_data_entsize(mp, dep->namelen); + ptr += dp->d_ops->data_entsize(dep->namelen); /* * The entry is before the desired starting point, skip it. */ if ((char *)dep - (char *)hdr < wantoff) continue; - cook = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk, + cook = xfs_dir2_db_off_to_dataptr(geo, geo->datablk, (char *)dep - (char *)hdr); ctx->pos = cook & 0x7fffffff; - filetype = xfs_dir3_dirent_get_ftype(mp, dep); + filetype = dp->d_ops->data_get_ftype(dep); /* * If it didn't fit, set the final offset to here & return. */ if (!dir_emit(ctx, (char *)dep->name, dep->namelen, be64_to_cpu(dep->inumber), - xfs_dir3_get_dtype(mp, filetype))) { + xfs_dir3_get_dtype(dp->i_mount, filetype))) { xfs_trans_brelse(NULL, bp); return 0; } @@ -264,8 +263,8 @@ xfs_dir2_block_getdents( * Reached the end of the block. * Set the offset to a non-existent block 1 and return. */ - ctx->pos = xfs_dir2_db_off_to_dataptr(mp, mp->m_dirdatablk + 1, 0) & - 0x7fffffff; + ctx->pos = xfs_dir2_db_off_to_dataptr(geo, geo->datablk + 1, 0) & + 0x7fffffff; xfs_trans_brelse(NULL, bp); return 0; } @@ -286,13 +285,13 @@ struct xfs_dir2_leaf_map_info { STATIC int xfs_dir2_leaf_readbuf( - struct xfs_inode *dp, + struct xfs_da_args *args, size_t bufsize, struct xfs_dir2_leaf_map_info *mip, xfs_dir2_off_t *curoff, struct xfs_buf **bpp) { - struct xfs_mount *mp = dp->i_mount; + struct xfs_inode *dp = args->dp; struct xfs_buf *bp = *bpp; struct xfs_bmbt_irec *map = mip->map; struct blk_plug plug; @@ -300,6 +299,7 @@ xfs_dir2_leaf_readbuf( int length; int i; int j; + struct xfs_da_geometry *geo = args->geo; /* * If we have a buffer, we need to release it and @@ -309,12 +309,12 @@ xfs_dir2_leaf_readbuf( if (bp) { xfs_trans_brelse(NULL, bp); bp = NULL; - mip->map_blocks -= mp->m_dirblkfsbs; + mip->map_blocks -= geo->fsbcount; /* * Loop to get rid of the extents for the * directory block. */ - for (i = mp->m_dirblkfsbs; i > 0; ) { + for (i = geo->fsbcount; i > 0; ) { j = min_t(int, map->br_blockcount, i); map->br_blockcount -= j; map->br_startblock += j; @@ -333,8 +333,7 @@ xfs_dir2_leaf_readbuf( /* * Recalculate the readahead blocks wanted. */ - mip->ra_want = howmany(bufsize + mp->m_dirblksize, - mp->m_sb.sb_blocksize) - 1; + mip->ra_want = howmany(bufsize + geo->blksize, (1 << geo->fsblog)) - 1; ASSERT(mip->ra_want >= 0); /* @@ -342,14 +341,14 @@ xfs_dir2_leaf_readbuf( * run out of data blocks, get some more mappings. */ if (1 + mip->ra_want > mip->map_blocks && - mip->map_off < xfs_dir2_byte_to_da(mp, XFS_DIR2_LEAF_OFFSET)) { + mip->map_off < xfs_dir2_byte_to_da(geo, XFS_DIR2_LEAF_OFFSET)) { /* * Get more bmaps, fill in after the ones * we already have in the table. */ mip->nmap = mip->map_size - mip->map_valid; error = xfs_bmapi_read(dp, mip->map_off, - xfs_dir2_byte_to_da(mp, XFS_DIR2_LEAF_OFFSET) - + xfs_dir2_byte_to_da(geo, XFS_DIR2_LEAF_OFFSET) - mip->map_off, &map[mip->map_valid], &mip->nmap, 0); @@ -370,7 +369,7 @@ xfs_dir2_leaf_readbuf( i = mip->map_valid + mip->nmap - 1; mip->map_off = map[i].br_startoff + map[i].br_blockcount; } else - mip->map_off = xfs_dir2_byte_to_da(mp, + mip->map_off = xfs_dir2_byte_to_da(geo, XFS_DIR2_LEAF_OFFSET); /* @@ -396,18 +395,18 @@ xfs_dir2_leaf_readbuf( * No valid mappings, so no more data blocks. */ if (!mip->map_valid) { - *curoff = xfs_dir2_da_to_byte(mp, mip->map_off); + *curoff = xfs_dir2_da_to_byte(geo, mip->map_off); goto out; } /* * Read the directory block starting at the first mapping. */ - mip->curdb = xfs_dir2_da_to_db(mp, map->br_startoff); + mip->curdb = xfs_dir2_da_to_db(geo, map->br_startoff); error = xfs_dir3_data_read(NULL, dp, map->br_startoff, - map->br_blockcount >= mp->m_dirblkfsbs ? - XFS_FSB_TO_DADDR(mp, map->br_startblock) : -1, &bp); - + map->br_blockcount >= geo->fsbcount ? + XFS_FSB_TO_DADDR(dp->i_mount, map->br_startblock) : + -1, &bp); /* * Should just skip over the data block instead of giving up. */ @@ -419,7 +418,7 @@ xfs_dir2_leaf_readbuf( * was previously ra. */ if (mip->ra_current) - mip->ra_current -= mp->m_dirblkfsbs; + mip->ra_current -= geo->fsbcount; /* * Do we need more readahead? @@ -427,16 +426,16 @@ xfs_dir2_leaf_readbuf( blk_start_plug(&plug); for (mip->ra_index = mip->ra_offset = i = 0; mip->ra_want > mip->ra_current && i < mip->map_blocks; - i += mp->m_dirblkfsbs) { + i += geo->fsbcount) { ASSERT(mip->ra_index < mip->map_valid); /* * Read-ahead a contiguous directory block. */ if (i > mip->ra_current && - map[mip->ra_index].br_blockcount >= mp->m_dirblkfsbs) { - xfs_dir3_data_readahead(NULL, dp, + map[mip->ra_index].br_blockcount >= geo->fsbcount) { + xfs_dir3_data_readahead(dp, map[mip->ra_index].br_startoff + mip->ra_offset, - XFS_FSB_TO_DADDR(mp, + XFS_FSB_TO_DADDR(dp->i_mount, map[mip->ra_index].br_startblock + mip->ra_offset)); mip->ra_current = i; @@ -447,7 +446,7 @@ xfs_dir2_leaf_readbuf( * use our mapping, but this is a very rare case. */ else if (i > mip->ra_current) { - xfs_dir3_data_readahead(NULL, dp, + xfs_dir3_data_readahead(dp, map[mip->ra_index].br_startoff + mip->ra_offset, -1); mip->ra_current = i; @@ -456,15 +455,14 @@ xfs_dir2_leaf_readbuf( /* * Advance offset through the mapping table. */ - for (j = 0; j < mp->m_dirblkfsbs; j++) { + for (j = 0; j < geo->fsbcount; j += length ) { /* * The rest of this extent but not more than a dir * block. */ - length = min_t(int, mp->m_dirblkfsbs, + length = min_t(int, geo->fsbcount, map[mip->ra_index].br_blockcount - mip->ra_offset); - j += length; mip->ra_offset += length; /* @@ -489,22 +487,23 @@ out: */ STATIC int xfs_dir2_leaf_getdents( - xfs_inode_t *dp, /* incore directory inode */ + struct xfs_da_args *args, struct dir_context *ctx, size_t bufsize) { + struct xfs_inode *dp = args->dp; struct xfs_buf *bp = NULL; /* data block buffer */ xfs_dir2_data_hdr_t *hdr; /* data block header */ xfs_dir2_data_entry_t *dep; /* data entry */ xfs_dir2_data_unused_t *dup; /* unused entry */ int error = 0; /* error return value */ int length; /* temporary length value */ - xfs_mount_t *mp; /* filesystem mount point */ int byteoff; /* offset in current block */ xfs_dir2_off_t curoff; /* current overall offset */ xfs_dir2_off_t newoff; /* new curoff after new blk */ char *ptr = NULL; /* pointer to current data */ struct xfs_dir2_leaf_map_info *map_info; + struct xfs_da_geometry *geo = args->geo; /* * If the offset is at or past the largest allowed value, @@ -513,15 +512,12 @@ xfs_dir2_leaf_getdents( if (ctx->pos >= XFS_DIR2_MAX_DATAPTR) return 0; - mp = dp->i_mount; - /* * Set up to bmap a number of blocks based on the caller's * buffer size, the directory block size, and the filesystem * block size. */ - length = howmany(bufsize + mp->m_dirblksize, - mp->m_sb.sb_blocksize); + length = howmany(bufsize + geo->blksize, (1 << geo->fsblog)); map_info = kmem_zalloc(offsetof(struct xfs_dir2_leaf_map_info, map) + (length * sizeof(struct xfs_bmbt_irec)), KM_SLEEP | KM_NOFS); @@ -531,14 +527,14 @@ xfs_dir2_leaf_getdents( * Inside the loop we keep the main offset value as a byte offset * in the directory file. */ - curoff = xfs_dir2_dataptr_to_byte(mp, ctx->pos); + curoff = xfs_dir2_dataptr_to_byte(ctx->pos); /* * Force this conversion through db so we truncate the offset * down to get the start of the data block. */ - map_info->map_off = xfs_dir2_db_to_da(mp, - xfs_dir2_byte_to_db(mp, curoff)); + map_info->map_off = xfs_dir2_db_to_da(geo, + xfs_dir2_byte_to_db(geo, curoff)); /* * Loop over directory entries until we reach the end offset. @@ -551,9 +547,9 @@ xfs_dir2_leaf_getdents( * If we have no buffer, or we're off the end of the * current buffer, need to get another one. */ - if (!bp || ptr >= (char *)bp->b_addr + mp->m_dirblksize) { + if (!bp || ptr >= (char *)bp->b_addr + geo->blksize) { - error = xfs_dir2_leaf_readbuf(dp, bufsize, map_info, + error = xfs_dir2_leaf_readbuf(args, bufsize, map_info, &curoff, &bp); if (error || !map_info->map_valid) break; @@ -561,7 +557,8 @@ xfs_dir2_leaf_getdents( /* * Having done a read, we need to set a new offset. */ - newoff = xfs_dir2_db_off_to_byte(mp, map_info->curdb, 0); + newoff = xfs_dir2_db_off_to_byte(geo, + map_info->curdb, 0); /* * Start of the current block. */ @@ -571,20 +568,20 @@ xfs_dir2_leaf_getdents( * Make sure we're in the right block. */ else if (curoff > newoff) - ASSERT(xfs_dir2_byte_to_db(mp, curoff) == + ASSERT(xfs_dir2_byte_to_db(geo, curoff) == map_info->curdb); hdr = bp->b_addr; xfs_dir3_data_check(dp, bp); /* * Find our position in the block. */ - ptr = (char *)xfs_dir3_data_entry_p(hdr); - byteoff = xfs_dir2_byte_to_off(mp, curoff); + ptr = (char *)dp->d_ops->data_entry_p(hdr); + byteoff = xfs_dir2_byte_to_off(geo, curoff); /* * Skip past the header. */ if (byteoff == 0) - curoff += xfs_dir3_data_entry_offset(hdr); + curoff += dp->d_ops->data_entry_offset; /* * Skip past entries until we reach our offset. */ @@ -601,17 +598,17 @@ xfs_dir2_leaf_getdents( } dep = (xfs_dir2_data_entry_t *)ptr; length = - xfs_dir3_data_entsize(mp, dep->namelen); + dp->d_ops->data_entsize(dep->namelen); ptr += length; } /* * Now set our real offset. */ curoff = - xfs_dir2_db_off_to_byte(mp, - xfs_dir2_byte_to_db(mp, curoff), + xfs_dir2_db_off_to_byte(geo, + xfs_dir2_byte_to_db(geo, curoff), (char *)ptr - (char *)hdr); - if (ptr >= (char *)hdr + mp->m_dirblksize) { + if (ptr >= (char *)hdr + geo->blksize) { continue; } } @@ -632,13 +629,13 @@ xfs_dir2_leaf_getdents( } dep = (xfs_dir2_data_entry_t *)ptr; - length = xfs_dir3_data_entsize(mp, dep->namelen); - filetype = xfs_dir3_dirent_get_ftype(mp, dep); + length = dp->d_ops->data_entsize(dep->namelen); + filetype = dp->d_ops->data_get_ftype(dep); - ctx->pos = xfs_dir2_byte_to_dataptr(mp, curoff) & 0x7fffffff; + ctx->pos = xfs_dir2_byte_to_dataptr(curoff) & 0x7fffffff; if (!dir_emit(ctx, (char *)dep->name, dep->namelen, be64_to_cpu(dep->inumber), - xfs_dir3_get_dtype(mp, filetype))) + xfs_dir3_get_dtype(dp->i_mount, filetype))) break; /* @@ -653,10 +650,10 @@ xfs_dir2_leaf_getdents( /* * All done. Set output offset value to current offset. */ - if (curoff > xfs_dir2_dataptr_to_byte(mp, XFS_DIR2_MAX_DATAPTR)) + if (curoff > xfs_dir2_dataptr_to_byte(XFS_DIR2_MAX_DATAPTR)) ctx->pos = XFS_DIR2_MAX_DATAPTR & 0x7fffffff; else - ctx->pos = xfs_dir2_byte_to_dataptr(mp, curoff) & 0x7fffffff; + ctx->pos = xfs_dir2_byte_to_dataptr(curoff) & 0x7fffffff; kmem_free(map_info); if (bp) xfs_trans_brelse(NULL, bp); @@ -668,12 +665,14 @@ xfs_dir2_leaf_getdents( */ int xfs_readdir( - xfs_inode_t *dp, - struct dir_context *ctx, - size_t bufsize) + struct xfs_inode *dp, + struct dir_context *ctx, + size_t bufsize) { - int rval; /* return value */ - int v; /* type-checking value */ + struct xfs_da_args args = { NULL }; + int rval; + int v; + uint lock_mode; trace_xfs_readdir(dp); @@ -683,13 +682,19 @@ xfs_readdir( ASSERT(S_ISDIR(dp->i_d.di_mode)); XFS_STATS_INC(xs_dir_getdents); + args.dp = dp; + args.geo = dp->i_mount->m_dir_geo; + + lock_mode = xfs_ilock_data_map_shared(dp); if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) - rval = xfs_dir2_sf_getdents(dp, ctx); - else if ((rval = xfs_dir2_isblock(NULL, dp, &v))) + rval = xfs_dir2_sf_getdents(&args, ctx); + else if ((rval = xfs_dir2_isblock(&args, &v))) ; else if (v) - rval = xfs_dir2_block_getdents(dp, ctx); + rval = xfs_dir2_block_getdents(&args, ctx); else - rval = xfs_dir2_leaf_getdents(dp, ctx, bufsize); + rval = xfs_dir2_leaf_getdents(&args, ctx, bufsize); + xfs_iunlock(dp, lock_mode); + return rval; } |