diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/gfs2/bmap.c | 49 | ||||
| -rw-r--r-- | fs/gfs2/bmap.h | 34 | ||||
| -rw-r--r-- | fs/gfs2/ops_address.c | 6 | ||||
| -rw-r--r-- | fs/gfs2/ops_file.c | 2 |
4 files changed, 42 insertions, 49 deletions
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index 789f28c..11ffc56 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -1231,35 +1231,6 @@ int gfs2_file_dealloc(struct gfs2_inode *ip) } /** - * gfs2_write_calc_reserv - calculate number of blocks needed to write to a file - * @ip: the file - * @len: the number of bytes to be written to the file - * @data_blocks: returns the number of data blocks required - * @ind_blocks: returns the number of indirect blocks required - * - */ - -void gfs2_write_calc_reserv(struct gfs2_inode *ip, unsigned int len, - unsigned int *data_blocks, unsigned int *ind_blocks) -{ - struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); - unsigned int tmp; - - if (gfs2_is_dir(ip)) { - *data_blocks = DIV_ROUND_UP(len, sdp->sd_jbsize) + 2; - *ind_blocks = 3 * (sdp->sd_max_jheight - 1); - } else { - *data_blocks = (len >> sdp->sd_sb.sb_bsize_shift) + 3; - *ind_blocks = 3 * (sdp->sd_max_height - 1); - } - - for (tmp = *data_blocks; tmp > sdp->sd_diptrs;) { - tmp = DIV_ROUND_UP(tmp, sdp->sd_inptrs); - *ind_blocks += tmp; - } -} - -/** * gfs2_write_alloc_required - figure out if a write will require an allocation * @ip: the file being written to * @offset: the offset to write to @@ -1276,6 +1247,7 @@ int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset, struct buffer_head bh; unsigned int shift; u64 lblock, lblock_stop, size; + u64 end_of_file; *alloc_required = 0; @@ -1291,19 +1263,12 @@ int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset, *alloc_required = 1; shift = sdp->sd_sb.sb_bsize_shift; - if (gfs2_is_dir(ip)) { - unsigned int bsize = sdp->sd_jbsize; - lblock = offset; - do_div(lblock, bsize); - lblock_stop = offset + len + bsize - 1; - do_div(lblock_stop, bsize); - } else { - u64 end_of_file = (ip->i_disksize + sdp->sd_sb.sb_bsize - 1) >> shift; - lblock = offset >> shift; - lblock_stop = (offset + len + sdp->sd_sb.sb_bsize - 1) >> shift; - if (lblock_stop > end_of_file) - return 0; - } + BUG_ON(gfs2_is_dir(ip)); + end_of_file = (ip->i_disksize + sdp->sd_sb.sb_bsize - 1) >> shift; + lblock = offset >> shift; + lblock_stop = (offset + len + sdp->sd_sb.sb_bsize - 1) >> shift; + if (lblock_stop > end_of_file) + return 0; size = (lblock_stop - lblock) << shift; do { diff --git a/fs/gfs2/bmap.h b/fs/gfs2/bmap.h index 4e6cde2..c983177 100644 --- a/fs/gfs2/bmap.h +++ b/fs/gfs2/bmap.h @@ -10,10 +10,40 @@ #ifndef __BMAP_DOT_H__ #define __BMAP_DOT_H__ +#include "inode.h" + struct inode; struct gfs2_inode; struct page; + +/** + * gfs2_write_calc_reserv - calculate number of blocks needed to write to a file + * @ip: the file + * @len: the number of bytes to be written to the file + * @data_blocks: returns the number of data blocks required + * @ind_blocks: returns the number of indirect blocks required + * + */ + +static inline void gfs2_write_calc_reserv(const struct gfs2_inode *ip, + unsigned int len, + unsigned int *data_blocks, + unsigned int *ind_blocks) +{ + const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); + unsigned int tmp; + + BUG_ON(gfs2_is_dir(ip)); + *data_blocks = (len >> sdp->sd_sb.sb_bsize_shift) + 3; + *ind_blocks = 3 * (sdp->sd_max_height - 1); + + for (tmp = *data_blocks; tmp > sdp->sd_diptrs;) { + tmp = DIV_ROUND_UP(tmp, sdp->sd_inptrs); + *ind_blocks += tmp; + } +} + int gfs2_unstuff_dinode(struct gfs2_inode *ip, struct page *page); int gfs2_block_map(struct inode *inode, sector_t lblock, struct buffer_head *bh, int create); int gfs2_extent_map(struct inode *inode, u64 lblock, int *new, u64 *dblock, unsigned *extlen); @@ -21,10 +51,6 @@ int gfs2_extent_map(struct inode *inode, u64 lblock, int *new, u64 *dblock, unsi int gfs2_truncatei(struct gfs2_inode *ip, u64 size); int gfs2_truncatei_resume(struct gfs2_inode *ip); int gfs2_file_dealloc(struct gfs2_inode *ip); - -void gfs2_write_calc_reserv(struct gfs2_inode *ip, unsigned int len, - unsigned int *data_blocks, - unsigned int *ind_blocks); int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset, unsigned int len, int *alloc_required); diff --git a/fs/gfs2/ops_address.c b/fs/gfs2/ops_address.c index 0df560f..6e4ea36 100644 --- a/fs/gfs2/ops_address.c +++ b/fs/gfs2/ops_address.c @@ -625,7 +625,7 @@ static int gfs2_write_begin(struct file *file, struct address_space *mapping, { struct gfs2_inode *ip = GFS2_I(mapping->host); struct gfs2_sbd *sdp = GFS2_SB(mapping->host); - unsigned int data_blocks, ind_blocks, rblocks; + unsigned int data_blocks = 0, ind_blocks = 0, rblocks; int alloc_required; int error = 0; struct gfs2_alloc *al; @@ -639,11 +639,13 @@ static int gfs2_write_begin(struct file *file, struct address_space *mapping, if (unlikely(error)) goto out_uninit; - gfs2_write_calc_reserv(ip, len, &data_blocks, &ind_blocks); error = gfs2_write_alloc_required(ip, pos, len, &alloc_required); if (error) goto out_unlock; + if (alloc_required || gfs2_is_jdata(ip)) + gfs2_write_calc_reserv(ip, len, &data_blocks, &ind_blocks); + if (alloc_required) { al = gfs2_alloc_get(ip); if (!al) { diff --git a/fs/gfs2/ops_file.c b/fs/gfs2/ops_file.c index a6b7a73..289c5f5 100644 --- a/fs/gfs2/ops_file.c +++ b/fs/gfs2/ops_file.c @@ -355,7 +355,6 @@ static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct page *page) goto out; set_bit(GIF_SW_PAGED, &ip->i_flags); - gfs2_write_calc_reserv(ip, PAGE_CACHE_SIZE, &data_blocks, &ind_blocks); ret = gfs2_write_alloc_required(ip, pos, PAGE_CACHE_SIZE, &alloc_required); if (ret || !alloc_required) goto out_unlock; @@ -367,6 +366,7 @@ static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct page *page) ret = gfs2_quota_lock_check(ip); if (ret) goto out_alloc_put; + gfs2_write_calc_reserv(ip, PAGE_CACHE_SIZE, &data_blocks, &ind_blocks); al->al_requested = data_blocks + ind_blocks; ret = gfs2_inplace_reserve(ip); if (ret) |
